Genesis 15
13 Ref And he said to Abram, Truly, your seed will be living in a land which is not theirs, as servants to a people who will be cruel to them for four hundred years;
14 Ref But I will be the judge of that nation whose servants they are, and they will come out from among them with great wealth.
15 Ref As for you, you will go to your fathers in peace; at the end of a long life you will be put in your last resting-place.
16 Ref And in the fourth generation they will come back here; for at present the sin of the Amorite is not full.