Midrash su Levitico 18:18

(Eliezer) replied: Verily I am not equal to one of them. If I had asked the Holy One, blessed be He, for land, it would be possible for Him to give this to me, as it is said, "The earth is the Lord's, and the fulness thereof" (Ps. 24:1). Had I asked the Holy One, blessed be He, for silver and gold, He could have given them to me, as it is said, "The silver is mine, and the gold is mine" (Hag. 2:8). But I asked the Holy One, blessed be He, that I might be worthy (to learn the) Torah only, as it is said, "Therefore I esteem all precepts concerning all things to be right; and I hate every false way" (Ps. 119:128).

10) (Vayikra 18:18) ("And a woman together with her sister you shall not take, to be rivals, to reveal her nakedness upon her in her lifetime") What is the intent of "upon her"? Because it is written (Devarim 25:5) "Her yavam (her husband's brother) shall come upon her," I might think that this applied even to one of the Scriptural forbidden relations; it is, therefore, written here "upon her," and there "upon her." Just as there, Scripture speaks of a yevamah; here, too, Scripture speaks of a yevamah, (notwithstanding which Scripture states "You shall not take.") This tells me only of (the prohibition against taking) his wife's sister (in yibum). Whence do I derive the same for the other arayoth (i.e., for his daughter married to his brother)? — Just as it is forbidden to take in yibum his wife's sister, who is an ervah, deliberate transgression with which is liable to kareth, and unwitting transgression, to a sin-offering, so, every ervah which is thus liable.

(Ibid. 29) "and the children of Israel walked in the dry land (that had already been made) in the midst of the sea." R. Shimon b. Yochai says: The sun and the moon testify that I have already split the sea for them, viz. (Jeremiah 31:35) "Thus said the L rd who gives the sun for light by day, the laws of moon and stars for light by night, who splits the sea and stuns its waves — the L rd of hosts is His name." R. Bana'ah says: In the merit of the mitzvoth performed by Abraham I will split the sea for them, viz. (Genesis 22:3) "and he split the wood for the burnt-offering" — and here (Exodus 14:21) "and the waters were split." R. Shimon Hatemani says: In the merit of circumcision I will split the sea for them, viz. (Jeremiah 33:25) "If not for My covenant, day and night, I would not have made the statutes of heaven and earth." Which covenant obtains both day and night? Circumcision. R. Avshalom the elder says: An analogy: A man gets angry with his son and drives him from the house. His lover comes in to beseech him to restore him to his house. He responds: Are you beseeching me for my son? I have already come to terms with my son. Thus, the L rd: "Why do you cry out to Me?" I have already come to terms with them." Rebbi says: Last night you said (i.e., you complained to Me) (Exodus 5:23) "And from the time I came to Pharaoh, etc." And now you stand and wax long in prayer? "Why do you cry out to Me?" Rebbi says (Exodus 14:15) "Speak to the children of Israel and have them go forward ('veyisa'u')." Have them retract ('yasiu') the things that they said. Last night they said (Ibid. 11) "Is it for lack of graves, etc.?" and now you stand and wax long in prayer (for them)? "Why do you cry out to Me?" Let them retract what they have said. The sages say: He wrought with them for His name's sake, viz. (Isaiah 48:11) "For My sake, for My sake shall I do, etc." And (Ibid. 63:12) "He split the sea before them." Why? (Ibid.) "To make Himself an eternal name." Rebbi says: Their faith in Me suffices Me to split the sea for them. As it is written (Exodus 14:2) "Let them return and encamp, etc." R. Elazar b. Azaryah says: In the merit of their father Abraham I will split the sea for them, viz. (Psalms 105:42) "For He remembered His holy word to Abraham His servant. (43) And He led out His people with joy, etc." R. Eliezer b. Yehudah of Bortutha says: In the merit of the tribes I will split the sea for them, viz. (Habakkuk 3:14) "You have split (the sea) for his tribes, the heads of his scattered ones, etc." And it is written (Psalms 136:13) "who split the sea into sections." Shmayah says: The faith that Abraham their father had in Me suffices for Me to split the sea for them, viz. (Exodus 4:31) "And the people believed when they heard, etc." Shimon of Kitron says: In the merit of the bones of Joseph I will split the sea for them, viz. (Genesis 39:12) "And he left his garment in her hand and he fled." And it is written (Psalms 114:3) "The sea saw and it fled, etc." R. Nathan says in the name of Abba Yossi Hamechuzi: ("Why do you cry out to Me?") Have I not had it written (Numbers 12:7) "In all of My house he (Moses) is trusted"? You (Moses) are in My dominion and the sea is in My dominion, and I have appointed you a keeper over it. (Therefore, [Exodus 14:16] "Raise your staff, etc.") R. Chanina b. Chachinai says: Have I not had it written (Mishlei 17:17) "A brother is born for (times of) trouble"? I am a brother to Israel in their time of trouble. "Brother" (here) signifies Israel, viz. (Psalms 122:8) "For the sake of My brothers and My friends I will speak for peace in you (Jerusalem)." R. Shimon b. Yehudah says: "Why do you cry out to Me?" Their cries have already preceded yours, viz. (Exodus 14:10) "and the children of Israel cried out to the L rd, etc." R. Acha says: The Holy One Blessed be He said: If not for your outcry, I would have destroyed them for the idolatry in their midst, viz. (Zechariah 10:11) "And tzarah crossed the sea," tzarah (here) being idolatry, as in (Isaiah 28:20) "and the molten image, tzarah, etc." and as in (Leviticus 18:18) "And a woman to her sister do not take litzror" (to be a rival). And because of your outcry I have withdrawn My wrath, as it is written (Psalms 106:22-23) ("… awesome deeds at the Red Sea) and he thought to destroy them if Moses His chosen one had not stood in the breach before Him, to turn His wrath from destruction." R. Eliezer Hamodai says: "Why do you cry out to Me?" I do not have to be commanded for the children of Israel, (Isaiah 45:11) "For My children and the work of My hands would you command Me?" Are they not "readied" before Me from the six days of creation? (Jeremiah 31:36) "Just as these laws (of nature) will not depart from before Me, says the L rd, so the children of Israel will not cease from being a nation before me for all time." Others say: The faith that they had in Me suffices for Me to split the sea for them. They did not say to Moses: How can we go out to the desert without food? But they believed in Moses and followed him. Of this it is written in the Tradition (Jeremiah 2:2) "Go and call out in the ears of Jerusalem, saying … I have remembered for you the lovingkindness of your youth, the love of your espousals, your following Me in the desert, in a land unsown." How were they rewarded for this? (Ibid. 3) "Holy is Israel unto the L rd, the first of His harvest. All of its eaters will be blamed. Evil will come upon them, says the L rd." R. Yossi Haglili says: When Israel entered the sea, Mount Moriah was uprooted from its place, with the altar of Israel built upon it, and its woodpile upon it, and Isaac bound upon it upon the altar, and Abraham stretching out his hand and taking the knife to slaughter his son — whereupon the L rd said to Moses: Moses, My children are in trouble, the sea raging and the foe pursuing them, and you stand and indulge in prayer? Moses: But what can I do? The L rd: "Raise your staff and stretch out your hand over the sea, etc." And you — exalt and praise and accord song and praise and thanks and grandeur and glory and splendor and hallel to the Master of wars!