Midrasz do Rodzaju 17:15

R. Isaac said: "A year which is poor (Israel appears humble) in the beginning, will be rich in the end (Israel's request will be granted). What is the reason for it? For it is written (Deut. 11, 12) From the beginning of the year even unto the end of the year; i.e., there are two parts in a year, the beginning and the end." (Ib. b) K. Isaac said again: "A man is judged only according to his deeds at the time of sentence; as it is said (Gen. 21, 17) God heard the voice of the lad, as he then was." Another thing R. Isaac said: "Three things cause a man's record of sins to be recalled. Three occasions cause the sins of man to be brought to mind: a threatening wall, calculating during prayer, and one who appeals to the Lord for judgment on his neighbor; for R. Chanin said: 'Whoever appeals to the Lord for judgment on his neighbor is first punished; as we find in the case of Sarah, who said (Gen. 16, 5) I suffer wrong through thee, may the Lord judge between me and thee. And shortly after this we read (Ib. 23, 2) And Abraham came to mourn Sarah and to weep for her.'" Another thing said R. Isaac: "Four things cause an evil decree which is passed on man to be torn (annulled). They are charity, prayer, change of name and change of conduct: Charity, as it is written (Prov. 10, 2) Charity delivereth from death; prayer, as it is WTitten (Ps. 97, 19) They cry unto the Lord when they are in distress, and He saveth them out of their afflictions; change of name, as it is written (Gen. 17, 15) As for Sarai, thy wife, thou shalt not call her name Sarai, but Sarah shall her name be: and the text continues saying: Then will I bless her, and give thee a son also, because of her change of conduct; as it is written (Jonah 3, 10) And God saw their works that they had turned from their evil ways; and immediately following: And God bethought Himself of the evil He had said He would do unto them, and He did it not." Some add also the change of location; as it is said (Gen. 12, 1-2) And God said to Abraham, get thee out from thy land [and afterwards] I will make of thee a great nation. But the former authority claims that the latter one was on account of the merits of the land of Israel.

(10) R. Isaac said: "A year which is poor (Israel appears humble) in the beginning, will be rich in the end (Israel's request will be granted). What is the reason for it? For it is written (Deut. 11, 12) From the beginning of the year even unto the end of the year; i.e., there are two parts in a year, the beginning and the end." (Ib. b) K. Isaac said again: "A man is judged only according to his deeds at the time of sentence; as it is said (Gen. 21, 17) God heard the voice of the lad, as he then was." Another thing R. Isaac said: "Three things cause a man's record of sins to be recalled. Three occasions cause the sins of man to be brought to mind: a threatening wall, calculating during prayer, and one who appeals to the Lord for judgment on his neighbor; for R. Chanin said: 'Whoever appeals to the Lord for judgment on his neighbor is first punished; as we find in the case of Sarah, who said (Gen. 16, 5) I suffer wrong through thee, may the Lord judge between me and thee. And shortly after this we read (Ib. 23, 2) And Abraham came to mourn Sarah and to weep for her.'" Another thing said R. Isaac: "Four things cause an evil decree which is passed on man to be torn (annulled). They are charity, prayer, change of name and change of conduct: Charity, as it is written (Prov. 10, 2) Charity delivereth from death; prayer, as it is WTitten (Ps. 97, 19) They cry unto the Lord when they are in distress, and He saveth them out of their afflictions; change of name, as it is written (Gen. 17, 15) As for Sarai, thy wife, thou shalt not call her name Sarai, but Sarah shall her name be: and the text continues saying: Then will I bless her, and give thee a son also, because of her change of conduct; as it is written (Jonah 3, 10) And God saw their works that they had turned from their evil ways; and immediately following: And God bethought Himself of the evil He had said He would do unto them, and He did it not." Some add also the change of location; as it is said (Gen. 12, 1-2) And God said to Abraham, get thee out from thy land [and afterwards] I will make of thee a great nation. But the former authority claims that the latter one was on account of the merits of the land of Israel.

"God said..., 'Sarai your wife...'" In Proverbs (12:4), it is written, "A woman of valor is a crown to her husband." Rabbi Aha said, "Her husband was crowned through her, but she was not crowned through her husband." Our rabbis taught that she ruled over her husband. In all places, the man gives orders, but here (Genesis 21:12), "In all that Sarah orders you, listen to her voice." Said Rabbi Yehoshua Ben Korcha: 'The Yud that the Holy One of Blessing took from Sarai was given half to Sarah, and half to Avraham. Said Rabbi Shime'on Bar Yochai: The Yud that the Holy One of Blessing took from Sarai flew and posted itself in front of the Throne of the Holy One, and said: 'Master of the Universe! Because I am the smallest letter You took me out of the name of Sarai the Righteous!! The Holy One said: In the past you were in the name of a woman, and in the end of the name! Now I will put you in the name of a man, and on the beginning of the name, as it is written 'And Moshe called Hosea Bin Nun Yehoshua' (Numbers 13:16). Said Rabbi Mana: Sarai was just [a princess] for herself, now she will be a princess for all the world.