Êxodo 11:4 Referências do Talmudee: Berakhot

Did David know when it was [exactly] midnight, since even Moses our teacher was not certain ; as it is written, "About mid-night will I go out into the midst of Egypt" (Exod. xi. 4) ? What means "about midnight" ?

And since Moses knew it, what object had he in saying "About mid-night" ? Moses thought that perhaps Pharaoh's astrologers would err and say, "Moses is a liar." For a teacher has said : Teach thy tongue to say, "I do not know," lest thou be led to falsehoods and be apprehended.

Rab Ashe said : It happened in the middle of the night of the thirteenth [of the first month] which is the beginning of the fourteenth ; and thus spake Moses to Israel, "The Holy One, blessed be He, said, 'To-morrow, like the time of midnight, as it is now, I will go forth in the midst of Egypt.'"