Genesis 15:16 References

16 "Then in athe fourth generation they will return here, for bthe iniquity of the Amorite is not yet complete."

b Leviticus 18:24-28

Leviticus 18

24 'Do not defile yourselves by any of these things; for by all these athe nations which I am casting out before you have become defiled.
25 'For the land has become defiled, atherefore I have brought its punishment upon it, so the land bhas spewed out its inhabitants.
26 'But as for you, you are to keep My statutes and My judgments and shall not do any of these abominations, neither the native, nor the alien who sojourns among you
27 (for the men of the land who have been before you have done all these abominations, and the land has become defiled);
28 so that the land will not spew you out, should you defile it, as it has spewed out the nation which has been before you.

Other references for Genesis 15:16