REFERENCE SONS' SONS
Genesis 46:5-7 [46:5] And Jacob rose up from Beersheba: and the sons of Israel carried Jacob their father, and their little ones, and their wives, in the wagons which Pharaoh had sent to carry him. [46:6] And they took their cattle, and their goods, which they had gotten in the land of Canaan, and came into Egypt, Jacob, and all his seed with him: [46:7] His sons, and his sons' sons with him, his daughters, and his sons' daughters, and all his seed brought he with him into Egypt.
Deuteronomy 4:90 Only take heed to thyself, and keep thy soul diligently, lest thou forget the things which thine eyes have seen, and lest they depart from thy heart all the days of thy life: but teach them thy sons, and thy sons' sons ;
I Chronicles 8:40 And the sons of Ulam were mighty men of valour, archers, and had many sons, and sons' sons , an hundred and fifty. All these are of the sons of Benjamin.
Job 42:16 After this lived Job an hundred and forty years, and saw his sons, and his sons' sons , even four generations.