Leaving Egypt + "Anatevka"

(1) The LORD said to Moses and Aaron in the land of Egypt: (2) This month shall mark for you the beginning of the months; it shall be the first of the months of the year for you. (3) Speak to the whole community of Israel and say that on the tenth of this month each of them shall take a lamb to a family, a lamb to a household. (4) But if the household is too small for a lamb, let him share one with a neighbor who dwells nearby, in proportion to the number of persons: you shall contribute for the lamb according to what each household will eat. (5) Your lamb shall be without blemish, a yearling male; you may take it from the sheep or from the goats. (6) You shall keep watch over it until the fourteenth day of this month; and all the assembled congregation of the Israelites shall slaughter it at twilight. (7) They shall take some of the blood and put it on the two doorposts and the lintel of the houses in which they are to eat it. (8) They shall eat the flesh that same night; they shall eat it roasted over the fire, with unleavened bread and with bitter herbs. (9) Do not eat any of it raw, or cooked in any way with water, but roasted—head, legs, and entrails—over the fire. (10) You shall not leave any of it over until morning; if any of it is left until morning, you shall burn it. (11) This is how you shall eat it: your loins girded, your sandals on your feet, and your staff in your hand; and you shall eat it hurriedly: it is a passover offering to the LORD. (12) For that night I will go through the land of Egypt and strike down every first-born in the land of Egypt, both man and beast; and I will mete out punishments to all the gods of Egypt, I the LORD. (13) And the blood on the houses where you are staying shall be a sign for you: when I see the blood I will pass over you, so that no plague will destroy you when I strike the land of Egypt. (14) This day shall be to you one of remembrance: you shall celebrate it as a festival to the LORD throughout the ages; you shall celebrate it as an institution for all time. (15) Seven days you shall eat unleavened bread; on the very first day you shall remove leaven from your houses, for whoever eats leavened bread from the first day to the seventh day, that person shall be cut off from Israel. (16) You shall celebrate a sacred occasion on the first day, and a sacred occasion on the seventh day; no work at all shall be done on them; only what every person is to eat, that alone may be prepared for you. (17) You shall observe the [Feast of] Unleavened Bread, for on this very day I brought your ranks out of the land of Egypt; you shall observe this day throughout the ages as an institution for all time. (18) In the first month, from the fourteenth day of the month at evening, you shall eat unleavened bread until the twenty-first day of the month at evening. (19) No leaven shall be found in your houses for seven days. For whoever eats what is leavened, that person shall be cut off from the community of Israel, whether he is a stranger or a citizen of the country. (20) You shall eat nothing leavened; in all your settlements you shall eat unleavened bread. ...

(28) And the Israelites went and did so; just as the LORD had commanded Moses and Aaron, so they did. (29) In the middle of the night the LORD struck down all the first-born in the land of Egypt, from the first-born of Pharaoh who sat on the throne to the first-born of the captive who was in the dungeon, and all the first-born of the cattle. (30) And Pharaoh arose in the night, with all his courtiers and all the Egyptians—because there was a loud cry in Egypt; for there was no house where there was not someone dead. (31) He summoned Moses and Aaron in the night and said, “Up, depart from among my people, you and the Israelites with you! Go, worship the LORD as you said! (32) Take also your flocks and your herds, as you said, and begone! And may you bring a blessing upon me also!” (33) The Egyptians urged the people on, impatient to have them leave the country, for they said, “We shall all be dead.” (34) So the people took their dough before it was leavened, their kneading bowls wrapped in their cloaks upon their shoulders. (35) The Israelites had done Moses’ bidding and borrowed from the Egyptians objects of silver and gold, and clothing. (36) And the LORD had disposed the Egyptians favorably toward the people, and they let them have their request; thus they stripped the Egyptians. (37) The Israelites journeyed from Raamses to Succoth, about six hundred thousand men on foot, aside from children. (38) Moreover, a mixed multitude went up with them, and very much livestock, both flocks and herds. (39) And they baked unleavened cakes of the dough that they had taken out of Egypt, for it was not leavened, since they had been driven out of Egypt and could not delay; nor had they prepared any provisions for themselves. (40) The length of time that the Israelites lived in Egypt was four hundred and thirty years; (41) at the end of the four hundred and thirtieth year, to the very day, all the ranks of the LORD departed from the land of Egypt. (42) That was for the LORD a night of vigil to bring them out of the land of Egypt; that same night is the LORD’s, one of vigil for all the children of Israel throughout the ages.

Or has any god ventured to go and take for himself one nation from the midst of another by prodigious acts, by signs and portents, by war, by a mighty and an outstretched arm and awesome power, as the LORD your God did for you in Egypt before your very eyes?

And why did He bring darkness upon them? Because there were wicked people amongst the Israelites of that generation who had no desire to leave Egypt, and these died during the three days of darkness so that the Egyptians might not see their destruction and say, “These, (the Israelites) too have been stricken as we have”... (cf. Midrash Tanchuma, Bo 1; Exodus Rabbah 14:3).

Another opinion: "Chamushim went up" means one in five. Some say one in fifty. Some say one in five hundred. Rabbi Nehorai says: "[I swear by] the Temple Service! It was not one in five hundred that went out [but fewer]. ....

[I swear by] the Temple Service! It was not one in five hundred that went out [but fewer]. Rather, many Jews died in Egypt. When did they die? During the three days of darkness, as it says, 'People could not see each other' (Shemot 10:23). They were burying their dead, and they thanked and praised Hashem that their enemies could not see and rejoice at their downfall.