Midrash su Genesi 17:5

Abram, the same is Abraham. (I Chr. 1, 27.) i.e., at first he was the father (progenitor) of Aram but later he became the father (progenitor) of the entire world. And Sarai, the same is Sarah (lb.), i,e., at first she was a princess of her own nation but later she became a princess of the entire world. Bar Kappara recited: "Whoever calls him Abram instead of Abraham transgresses a positive commandment, for it is said (Gen. 17, 5.) But thy name shall be Abraham." R. Eliezer said: "He transgresses the prohibitory law which says: (Ib. ib. ib.) Neither shall thy name any more be called Abraham." But according to this, if one calls Sarai instead of Sarah, would you also say [that he transgresses the positive law]? Nay: In this case the Holy One, praise be He! said to Abraham only: As for Sarai thy wife, thou shall not call her name Sarai. but Sarah shall her name be. But according to this, if one calls Jacob "Jacob" instead of Israel, should we also say [that he transgresses the positive law]? Nay: The latter is different because the Scripture itself repeats his name later as Jacob, for it is written (Ib. 46, 2.) And God said to Israel in the vision of the night saying "Jacob, Jacob." R. Jose b. Abin and according to others R. Jose b. Zebida raised the following contradiction: Thou art indeed the Lord the (true) God, who didst choose Abram (Neh. 9, 7). [Hence he calls; him Abram]? There the prophet renewed the praises of the Lord by referring to the past [when Abraham's name was still Abram].

“So it is with a multitude of dreams and vanities and many words; rather, fear God” (Ecclesiastes 5:6).
“So it is with a multitude of dreams and vanities and many words; rather, fear God” – Rabbi said: If you saw harsh dreams or harsh and unnatural visions, or if you fear them, jump to three matters and you will be saved from them, as Rabbi Yudan said in the name of Rabbi Eliezer: There are three matters that abrogate evil decrees, and they are: Prayer, charity, and repentance. All three are in one verse; this is what is written: “My people, upon whom My name is called, will submit, and pray, and seek My countenance, and repent their evil ways; I will hear from the heavens, and forgive their sin and heal their land” (II Chronicles 7:14). “And pray” – this is prayer; “and seek my countenance” – this is charity, as you say: “I will behold your countenance in righteousness” (Psalms 17:15);¹⁵The same Hebrew root, tzedek, or tzedaka, can be translated as either charity or righteousness. “and repent their evil ways” – this is repentance. Then, “I will hear from the heavens…” Rabbi Mona said: Fasting as well, as it is stated: “The Lord will answer you on your day of trouble” (Psalms 20:2).¹⁶From the fact that the verse says, “day,” and not time of trouble, the midrash understands that the reference is to a day of fasting.
Rabbi Ḥiyya and Rabbi Yosei say: A change of name and a change of action, as well. Some say even a change of place, as it is written: “Go for yourself from your land” (Genesis 12:1). A change of name [is derived] from Abraham our patriarch, as it is stated: “Your name will no longer be called Abram, but your name will be Abraham” (Genesis 17:5). Abram cannot beget, Abraham can beget; Sarai cannot bear a child, Sarah can bear a child.¹⁷God changed Abram’s name to Abraham and Sarai’s name to Sarah when they were ninety-nine and eighty-nine years old respectively and bereft of children. In the same context, He promised them that they would have many descendants (see Genesis 17:1–16). The implication is that although Abram and Sarai could not have children, their name changes would enable them to do so. A change in action, from Nineveh, as it is stated: “God saw their actions, [that they turned from their evil way; and God reconsidered the harm that He had said He would do to them, and He did not do it]” (Jonah 3:10).
Rabba bar Meḥseya and Ḥama bar Gurya say: A fast is effective for a dream like fire for tow. Rav Ḥisda said: On that day. Rav Yosef said: Even on Shabbat. Likewise, you find regarding Hezekiah king of Judah; when Hezekiah fell ill, the Holy One blessed be He said to Isaiah: ‘Go say to him: “Set your house in order, as you will die and will not live”’ (Isaiah 38:1). Hezekiah said to Isaiah: ‘Isaiah, the way of the world is that a person who goes to visit the ill says to him: May they have mercy upon you from Heaven, and the doctor goes to him and says: Eat this item and do not eat that item; drink this and do not drink that. Even if he sees him approaching death, he would not say to him: Set your house in order, so he will not be discouraged; yet you say to me: “Set your house in order, as you will die and will not live”? I, too, do not ascribe importance to you and I will not heed your words, and I adopt only what my ancestor¹⁸Solomon said: “So it is with a multitude of dreams and vanities and many words…”’¹⁹Even prophetic dreams can be nullified and thereby rendered vanity, if one fulfills the conclusion of the verse, which states to “fear God.” This can be expressed via prayer, fasting, and repentance (Maharzu).
Immediately, “Hezekiah turned his face to the wall [hakir] [and prayed to the Lord]” (Isaiah 38:2). To which wall did he direct his face? Rabbi Yehoshua ben Levi said: He directed his face to the wall of Raḥav, as it is written: “Because her house was upon the side of [bekir] the wall” (Joshua 2:15). He said before Him: ‘Master of the universe, Raḥav rescued two souls for You and how many souls did You rescue for her?’ It was taught that Rabbi Shimon ben Yoḥai says: Even if her family numbered two hundred people and they cleaved to two hundred [additional] families [through marriage], they were all rescued by her merit. It is not written here, “all her family,” but rather, “they took out all her families” (Joshua 6:23). ‘My ancestors who assembled all the converts to You,²⁰See II Chronicles 2:16. all the more so.’²¹By their merit, You should rescue me.
Rabbi Shmuel bar Naḥman said: It was to the wall of the Shunamite woman that he directed his eyes, as it is written: “Let us make a [small] walled attic” (II Kings 4:10). He said before Him: ‘Master of the universe, this Shunamite woman made one wall for Elisha, and you revived her son; my ancestors who did all this tribute for you,²²This is a reference to the building of the Temple. all the more so.’
Rabbi Huna said in the name of Rabbi Yosei: It was to the walls of his heart that he directed his eyes, as it is stated: “My innards, my innards, I am trembling; the walls of my heart, my heart is murmuring” (Jeremiah 4:19). “His heart”²³This is interpreted as an allusion to the fact that Hezekiah turned to his own heart. is written.²⁴In standard editions of the Bible, it is in fact written “my heart,” not “his heart” as stated in the midrash. He said before him: ‘Master of the universe, I have surveyed the two hundred and forty-eight limbs that You formed in me, and I did not find that I angered You with any of them; all the more so that my life should be granted to me.’²⁵He said: Since it is Your way to forgive those who sin to You, all the more so should You grant me life given that I have not sinned (Etz Yosef).
The Rabbis say: He directed his eyes to the walls of the Temple, as it is written: “By their placing their threshold near My threshold…[with but a wall between Me and them]” (Ezekiel 43:8). He said before Him: ‘Master of the universe, my ancestors were great men, but were unable to pray in the Temple at all times;²⁶As they were married, they would become impure when they would have relations with their wives, and it would then be prohibited for them to enter the Temple. rather they would stand in their houses and pray, with a wall between them and the Temple. I, when I pray, have no wall between me and the Temple;²⁷Hezekiah had not married; see Berakhot 10a. all the more so that my life should be given to me.’
Immediately, “the word of the Lord was to Isaiah” (Isaiah 38:4),²⁸The following verses state: “Go, and say to Hezekiah…thus says the Lord, the God of David your father: I have heard your prayer, I have seen your tears; behold.… I will add to your days fifteen years.” [when] he had not [even] departed from there. Isaiah said before the Holy One blessed be He: ‘Master of the universe, initially, you said this to me and now you say that to me. How can I go and say so?’ [God] said to [Isaiah]: ‘He is humble and will accept it from you. Moreover, what you spoke has not yet become public, as it is written: “It was, Isaiah had not departed…”’ (II Kings 20:4). When Isaiah went to him, [Hezekiah] said to him: ‘Did I not say this to you initially: I do not ascribe importance to you and I will not heed your words; [I adopt] only what my ancestor said: “So it is with a multitude of dreams and vanities…”’

(Gen. 17:1:) WHEN ABRAM WAS NINETY < -NINE > YEARS OLD…. Let our master instruct us: Is it correct that one is permitted to heal on the Sabbath?⁹³Tanh., Gen. 3:16; Deut. 10:1. Thus have our masters taught (in Yoma 8:6.): WHERE LIFE IS IN DOUBT, IT OVERRIDES THE SABBATH; but if it is doubtful whether one is recovering or not recovering, one does not override < it >. For the sake of circumcision, however, one does override the Sabbath. R. Jose said: Come and see how dear circumcision is to the Holy One. When he told Abraham that he should be circumcised, it was hard on him. He said: If I circumcise < myself > now, I am lacking one member ('BR). The Holy One said to him: Before you circumcise yourself, [your name is Abram 'BRM] and the numerical value of its letters is 243. Now, since a person has 248 members, it is evident that you are lacking five members.⁹⁴Cf. Ned. 32b. But when you circumcise yourself, you are whole. He said to him: Sovereign of the World, how so? He said to him (in Gen. 17:5): YOUR NAME SHALL NO LONGER BE CALLED ABRAM, BUT YOUR NAME SHALL BE ABRAHAM ('BRHM),⁹⁵The extra letter accounts for the other five members. and you shall become whole.

Another interpretation (of Gen. 5:1): THIS IS THE BOOK < OF THE GENERATIONS OF ADAM >. This text is related (to Is. 41:2): WHO HAS WROUGHT AND DONE IT? THE ONE WHO NAMED THE GENERATIONS FROM THE BEGINNING. If the generations were worthy, the Holy One gave them their names just as he had given names to Adam and Eve. Thus it is stated (in Gen. 5:2): AND HE GAVE THEM THE NAME ADAM. You also find that when the Holy One sees a righteous one born, he gives him his name as a mark of honor. He named Noah because he was righteous, as stated (in Gen. 5:29): AND HE CALLED HIS NAME NOAH. He named Abraham, as stated (in Gen. 17:5): BUT YOUR NAME SHALL BE ABRAHAM. So also with Isaac, Jacob, Solomon, and Josiah. Thus it is stated (in I Kings 13:2): BEHOLD, A SON SHALL BE BORN UNTO THE HOUSE OF DAVID; JOSIAH SHALL BE HIS NAME. If the generations were worthy, he would give a name to each and every one; and from his name he would make known his works. Our masters have said:⁹⁰Cf. Yoma 83b; yRH 3:9 (59a). When R. Me'ir would see a person, he would learn his name, and from his name he would know his works. Once upon a time two students came to him, and one had the name Kidor. R. Me'ir said to his students: Beware of this Kidor. They said to him: He is a Torah scholar. He said to them: [Nevertheless], you yourselves beware of him. One day they went to the bathhouse and deposited their clothes with Kidor. He took their clothes and went away. When they came out, they did not find < him >. They went to their houses and put on other clothes. They came to R. Me'ir. R. Me'ir said to them: Why did you change your clothes? They said to him: We went to the bathhouse and deposited our clothes with Kidor, but he took them. He said to them: Did I not say to you: Beware of this man? They said to him: O our master, if you please, < tell us > how you knew. He said to them: From his name, for it is written (in Deut. 32:20): FOR (Ki) A GENERATION (dor) OF PERVERSITY ARE THEY…. So also you find in Egypt (in Numb. 3:21): THE LIBNITE FAMILY. At what time did he give them their names? When Pharaoh arose and worked them with clay and brick (rt.: LBN). Ergo: THE LIBNITE (rt.: LBN) FAMILY. (Deut. 32:20, cont.:) AND THE SHIMEITE (rt.: ShM') FAMILY. When they complained of the servitude, the Holy One heard (rt.: ShM') their prayer. (Deut. 32:27:) AND THE HEBRONITE (rt.: HBR) FAMILY, to whom the Divine Presence was allied (rt.: HBR). <These examples > are to teach you that if the generations were worthy, the Holy One would give them their names, as stated (in Is. 41:4): THE ONE WHO NAMED THE GENERATIONS….

...Bar Kappara said, "Anyone who calls Abraham, 'Abram,' transgresses a negative commandment." R. Levi said, "[Both] a positive commandment and a negative commandment: 'Neither shall your name any more be called Abram,' is with a negative commandment; 'but thy name shall be Abraham,' is with a positive commandment." But behold the men of the Great Assembly called him Abram - "You are the Lord, God, who chose Abram" (Nehemiah 9:7)!?

...Rabbi Berechya, Rabbi Chiya, and the Rabbis "from there" [Babylonia] stated in the name of Rabbi Yehudah: Not a day passes that the Holy and Blessed One does not innovate some halacha in the heavenly court. What is the reason [prooftext]? As it is written: "Listen, listen to the roar of His voice, to the sound (hegeh) that issues from His mouth" (Job 37:2). And hegeh is none other than Torah, as it is written "meditate (v'hegita) on it day and night" (Joshua 1:8). And even these halachot was known by our father Abraham.