Exodus 12:37-42 - The Israelites Leave Egypt
37 And the sons of Israel journeyed from Rameses to Succoth, about six hundred thousand on foot who were men, besides children. 38 And a mixed multitude also went up with them, and flocks, and herds, even very much cattle. 39 And they baked unleavened cakes of the dough which they brought forth out of Egypt, for it was not leavened, because they were thrust out of Egypt, and could not tarry, neither had they prepared for themselves any provisions.
40 Now the time that the sons of Israel dwelt in {the land of Egypt and the land of Canaan (LXX)} was four hundred and thirty years. 41 And it came to pass at the end of four hundred and thirty years, even the selfsame day it came to pass, that all the armies of LORD went out from the land of Egypt. 42 It is a night to be much observed to LORD for bringing them out from the land of Egypt. This is that night of LORD, to be much observed of all the sons of Israel throughout their generations.