If any one fail to meet a claim for debt, and sell himself, his wife, his son, and daughter for money or give them away to forced labor: they shall work for three years in the house of the man who bought them, or the proprietor, and in the fourth year they shall be set free.
Sons were also born to Shem, whose older brother was Japheth; Shem was the ancestor of all the sons of Eber. Genesis 10:21 NIV