מדרש אויף בראשית 25:14

... R’ Eliezer haModa’i says: “Why do you cry out to Me?” (Exodus 14:15) Do I need to be told what to do regarding my children?! “…concerning My children and the work of My hands do you command Me?” (Isaiah 45:11) Were they not already prepared before Me from the six days of creation? As it says “If these laws depart from before Me, says the Lord, so will the seed of Israel cease being a nation before Me for all time.” (Jeremiah 31:35) Others say: Israel did a great thing. For the sake of the faith with which they believed in Me it is worth it to split the sea. For they did not say to Moshe ‘how can we go out into this barren wilderness without supplies for the journey?!’ Rather, they had faith and followed after Moshe, as it says in the prophets “Go and call out in the ears of Jerusalem, saying: so said the Lord: I remember to you the lovingkindness of your youth, the love of your nuptials, your following Me in the desert, in a land not sown.” (Jeremiah 2:2) What reward did they receive for this? “Israel is holy to the Lord, the first of His grain; all who eat him shall be guilty, evil shall befall them, says the Lord.” (Jeremiah 2:3) R’ Yosi haGalili says: when Israel entered the sea Mount Moriah was already uprooted from its place, together with the altar of Yitzchak which was built on it with the wood all laid out. It was as if Yitzchak was bound and placed on the altar and Avraham had stretched out his hand to take the knife and slaughter his son, as it says “And Abraham stretched forth his hand and took the knife, to slaughter his son.” (Genesis 22:10) God (HaMakom) said to Moshe: Moshe, my children are in distress, the sea is closing, the enemy is pursuing and you stand there drawing out your prayer?! He said before Him: and what should I do? He replied: “And you raise your staff and stretch out your hand over the sea…” (Exodus 14:16) You should elevate, exalt, give song, exultation, thanksgiving, greatness, splendor, glory and praise to He to whom all battles belong.

Rabbi Jochanan in the name of R. Jose said: "To him who observes the Sabbath, with enjoyments, will be given boundless inheritance, as it is written (Is. 58, 14.) Then Shalt thou find delight in the Lord, etc., And I will cause thee to enjoy the inheritance of Jacob, thy father. Not such inheritance as was promised to Abraham, (Gen. 13. 14) Arise and walk through the land to its length and breadth, and not as it was promised to Isaac (Ib. 26, 3.) I will give thee all that this land contains, but as it was promised to Jacob (Ib. 28, 14.) And thou shall spread abroad, to the West, and to the East, to the North, and to the South." R. Nachman b. Isaac said: "He will be saved from the subjugation of exile; for it is written (Is. 58, 14.) And I will cause thee to tread upon the high places of the earth; it is also written there (Deu. 33, 39.) And thou shalt tread upon their high places." R. Juda said in the name of Rab: "To him who observes the Sabbath, with enjoyment, will be granted his heart's desires, for it is said (Ps. 37, 4.) And delight thyself in the Lord, and He will give thee the wishes of thy heart. The word delight is not understood in its real meaning. Since it says (Is. 58, 13.) And if thou call the Sabbath delight; then we knew that it means delight of the Sabbath. R. Chiya b. Abba in the name of R. Jochanan said: "He who observes the Sabbath properly, according to its commandment, even if he worship idols, as did the generation of Enosh, will be pardoned, for it is said (Is. 56, 2) Happy is the man that ever doth thus, etc., by not violating it. Do not read it, M'chalelo (violating it), but read it Machul-lo (pardoned) him)." R. Juda, in the name of Rab, said: "If Israel had strictly observed the first Sabbath, no nation or race would have been able to dominate over them, for it is said (Ex. 16, 27.) And it came to pass on the seventh day, that there went out some of the people to gather (the Manna) but did not find them. Immediately following is written: Then came Amalek." R. Jochanan in the name of R. Simon b. Jochai. said: "If Israel would observe two Sabbaths, only, according to the strict requirements of the law, they would at once be redeemed, for it is written (Is. 56, 4.) Thus saith the Lord unto the eunuchs that keep my Sabbaths, and immediately following is written, Even them will I bring to my holy mountain."