Genesis 15:16
But in the fourth generation they shall come hither again: for the iniquity of the Amorites is not yet full.
More from Genesis 15
After these things the word of the LORD came unto Abram in a vision, saying, Fear not, Abram: I am thy shield, and thy exceeding great reward.
And Abram said, Lord GOD, what wilt thou give me, seeing I go childless, and the steward of my house is this Eliezer of Damascus?
And Abram said, Behold, to me thou hast given no seed: and, lo, one born in my house is mine heir.
And, behold, the word of the LORD came unto him, saying, This shall not be thine heir; but he that shall come forth out of thine own bowels shall be thine heir.
And he brought him forth abroad, and said, Look now toward heaven, and tell the stars, if thou be able to number them: and he said unto him, So shall thy seed