Genesis 15:16 in the World English Bible
In the fourth generation they will come here again, for the iniquity of the Amorite is not yet full.”
Context
15 And thou shalt go to thy fathers in peace; thou shalt be buried in a good old age.
16 But in the fourth generation they shall come hither again: for the iniquity of the Amorites is not yet full.
17 And it came to pass, that, when the sun went down, and it was dark, behold a smoking furnace, and a burning lamp that passed between those pieces.