Midrash su Genesi 15:16

God led them not by the way of the Philistines (ibid. 13:17). He guided them in the manner indicated in the verse Thou didst lead Thy people like a flock (Ps. 77:21), and as in the verse By day also He led them by a cloud (ibid. 78:14). By the way of the land of the Philistines, although that was near. The word near indicates that the promise the Holy One, blessed be He, had made to Abraham was soon to be fulfilled. Near also implies that it was the nearest way to return to Egypt. Furthermore near relates to the oath Abraham had sworn with Abimelech. Now therefore, swear unto me here by God, that thou wilt not deal falsely with me, or with my son, nor with my son’s son (Gen. 21:23) was near fulfillment, even though his grandson had not yet been born. Furthermore, near implies that the previous war was too recent to risk another.¹The “previous war” being the one referred to in the continuation of the verse: lest … the people repent when they see war (Exod. 17:1). A tradition exists that the descendants of Ephraim left Egypt before the designated time and 300,000 were killed. See Ginzberg, Legends, vol. 3:8–9. Only ten escaped. Another explanation of Although that was near. It was too close to the time in which the Canaanites had obtained the land, for it is written: And in the fourth generation they shall come back hither (ibid. 15:16), and the fourth generation had not yet come. God led the people about by the way of the wilderness (Exod. 12:18). The Holy One, blessed be He, said: If I lead them into the land by the most direct route, they will each take possession of a field and a vineyard and neglect the law. Therefore I will lead them through the wilderness for forty years and cause them to eat the manna and drink the water of the well so that the law may penetrate into their very beings.

Now the time that the children of Israel dwelt in Egypt was four hundred and thirty years (Exod. 12:40). Yet it is written: And shall serve them, and they shall afflict them four hundred years (Gen. 15:13). Since these two verses are obviously contradictory, how can they be reconciled? The first decree was issued prior to the birth of Isaac, but after Isaac’s birth, the Holy One, blessed be He, reconsidered the matter, as it is said: Thy seed shall be a stranger, and they shall afflict them four hundred years. Abraham reflected on this subject at the time of the decree. It is written: And they shall afflict them four hundred years, but it is also written: In the fourth generation they shall come back hither (ibid., v. 16). How can these verses be reconciled? These verses suggest that, if they repent, I will redeem them after four generations, but if not, after four hundred years. And it came to pass at the end of four hundred and thirty years (Exod. 12:41). At the end of that time he did not delay them as long as the blink of an eye. It was on the fifteenth day of Nisan that he issued the decree and spoke to Abraham our father, at the time of making the covenant-between-the-parts. It was on the fifteenth day of Nisan that ministering angels came to inform him about the birth of Isaac; it was on the fifteenth day of Nisan that Isaac was born; it was on the fifteenth day of Nisan that they were redeemed from Egypt; and it is on the fifteenth day of Nisan that they will be redeemed from servitude to kingdoms. The same day was designated for all these events.

(Exodus 13:17) "And it was, when G d sent ("shalach") the people": "sending" in all places is accompaniment, viz. (Genesis 18:16) "And Abraham went with them to send them," (Ibid. 26:31) "And Israel sent them." The mouth (of Pharaoh) that said (Exodus 5:2) "Israel, too, I will not send," it is that (mouth) which said (Ibid. 10:10) "I will send you and your children." How was he rewarded for this? (Devarim 23:8) "You shall not abominate an Egyptian." The mouth which said (Exodus 5:2) "I do not know the L rd," it is that (mouth) which said (Ibid. 14:25) "I will flee from before Israel, for the L rd wars for them against the Egyptians." How was he rewarded for this? (Isaiah 19:19) "On that day there will be an altar to the L rd in the midst of the land of Egypt and a pillar at its border to the L rd." The mouth which said (Exodus 5:2) "Who is the L rd that I should hearken to His voice," it is that mouth which said (Ibid. 9:27) "the L rd is the Tzaddik, and I and my people are the wicked" — wherefore He gave them a place for burial, as it is written (Ibid. 15:12) "You inclined Your right hand — the earth swallowed them up." (Ibid.) "that G d did not lead them ('nacham')." This "nichum" connotes leading, as in (Psalms 77:21) "You have led (nachitha) Your people like sheep," and (Ibid. 78:4) "And He led them (vayanchem) with a cloud by day, and all the night with a light of fire." "by way of the land of the Philistines, for it was near": Near (i.e., "close") is the thing of which the Holy One Blessed be He spoke to Moses (Exodus 2:12): "When you take the people out of Egypt, you will serve G d on this mountain." Variantly: "for it was near": It afforded easy return to Egypt, viz. (Ibid. 5:3) "Let us go a three days' distance in the desert." Variantly: "for it was near": Close (in time) was the oath that Abraham had sworn to Avimelech, viz. (Genesis 21:23) "And now, swear to me here by G d that you will not deal with me falsely (by trespassing on my land), or to my son or my grandson," and his grandson was still alive. Variantly: "for it was near": The first war (that with Egypt) was too close to the second (that with Canaan). Variantly: "for it was near": The Canaanites had only recently acquired the land, and (Genesis 15:16) "And they (the Israelites) shall return here in the fourth generation, for the sin of the Amorites is not yet complete." Variantly: "for it was near": The Holy One Blessed be He did not bring them directly to Eretz Yisrael but by way of the desert, saying: If I bring them there now, immediately each man will seize his field, and each man his vineyard and they will neglect Torah study. Rather, I will keep them in the desert forty years, eating manna and drinking from the well, and the Torah will be absorbed in their bodies. From here R. Shimon would say: The Torah was given to be expounded only by the eaters of manna, and, like them, the eaters of terumah (i.e., the Cohanim). Variantly: "for it was near": The L rd did not bring them in directly. For when the Canaanites heard that the Israelites were coming, they arose and burned all the vegetation and cut down all the trees, and razed the buildings, and stopped up the springs — whereas the Holy One Blessed be He said: I did not promise their fathers to bring them to a ruined land, but one full of all good things, viz. (Devarim 6:11) "and houses full of all good." Rather, I will keep them in the desert until the Canaanites arise and restore what they have destroyed. (Ibid.) "for the L rd said: Lest the people bethink themselves when they see war": This is the war of Amalek, viz. (Numbers 14:45). "Variantly: "for the L rd said, etc.": This is the war of the sons of Ephraim, viz. (I Chronicles 7:20-21), and (Psalms 78:9-72). They transgressed the appointed time (for the redemption) and the oath, viz. (Genesis 50:25). "for the L rd said, etc.": So that they not see the bones of their brethren strewn in Philistia and return (to Egypt). Now does this not follow a fortiori, viz.: If, when He took them in a circuitous way, they said (Numbers 14:4) "Let us make a head and return to Egypt," how much more so if He would take them in a straight way!