And God spoke in this way,
That his descendants should live in a strange land; and that they should bring them into bondage, and ill-treat them for four hundred years.
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Tertullian of Carthage
AD 220
If, before the priesthood of the Levitical law, there were not levites who were wont to offer sacrifices to God? For thus, after the above-mentioned patriarchs, was the Law given to Moses, at that (well-known) time after their exode from Egypt, after the interval and spaces of four hundred years. In fact, it was after Abraham's "four hundred and thirty years"