Kabbalah su Esodo 12:78

The verse, "flocks, and menservants, and women servants," refers to lower crowns of the Kelipot, which the Holy One, blessed be He, slew in Egypt. They are called "the firstborn of cattle" (Shemot 12:29), "the firstborn of the captive" (Ibid.), and "the firstborn of the maidservant" (Shemot 11:5). Esau took fright and came toward him; he feared Jacob as much as Jacob feared him.

Now we need to examine this - on Passover Israel is removed from the bread that is called chametz (leavened), as it is written (Exodus 13:7) "and you shall not see any leavened bread", and it is written (Exodus 12:19), "for anyone who eats leavening etc." What is the reason for this? Because of the preciousness of that bread which is called matzah. For now that Israel has merited a more elevated form of bread, is it not therefore appropriate to do away with chametz and make it completely invisible? But why, then, does this offering [on Shavuot] include chametz? As it is written, (Leviticus 23:17) "it shall be a measure of choice flour, baked with leavening." And furthermore, on this day when the evil inclination is vanquished, and the Torah - which is called "freedom" - is present?

Erev/night - as you say "and also an erev rav went up with them" (Ex. 12:38), since all those pure travails are the ones that mix [mit'arev] with the forces of the night. And this is why there is no obligation regarding the night prayer, because no person can say it like Ya'akov, who was the master of the dwelling, and was the [only] one who could say it properly.

And you may wonder how the ark survived, even though it was seen in the world through which the Angel of Destruction walked? But, as long as the face of the person is not seen by the Angel of Destruction, he cannot rule over him. And how do we know this? From Egypt. Because the verse reads: "As none of you shall go out of the door of his house until the morning" (Shemot 12: 22). The reason is that the Angel of Destruction was present (outside) and could destroy anyone, and none should be seen before him. This is why Noah and all those who joined him hid within the ark. There, the Angel of Destruction had no power over them.

As we previously explained, the words "To destroy all flesh" (Gen. 6:17) refer to the Angel of Destruction. This is why it is also written: "And He will not allow the Angel of Destruction to come into your house to smite you" (Exodus 12:23). (He does not give him permission to destroy). To "destroy all flesh" is from (the Angel of Destruction, hinted to in the verse), "The End of all Flesh is come before Me," (to ask permission). The time the Holy One, blessed be He had waited for them to repent had passed. That is, Noah had reached 600 years of age, (and He could reward him. The time had also come for the punishment of the wicked. That is why He gave permission to the Angel of Destruction) "to destroy all flesh." He said: This is what we learned in the name of Rabbi Yitzchak, who told us all this.

And she [Tamar] sat on Petach Eynayim [the entrance to the eyes] (Gen. 38:14) - Just as you say "and he [Avraham] sits at the entrance [petach] of the tent" (Gen. 18:1), and it is written "And Ad-nai passed over the entrance [petach]" (Ex. 12:23), and it is written "open [pitchu] for me the gates of righteousness etc" (Ps. 118:19) [meaning] that all eyes of the world turn to that opening. [...]