1 Kings 11:20-21

20And the sister of Tahpenes bore Hadad a son named Genubath. Tahpenes herself weaned him in Pharaoh’s palace, and Genubath lived there among the sons of Pharaoh.

21When Hadad heard in Egypt that David had rested with his fathers and that Joab, the commander of the army, was dead, he said to Pharaoh, “Let me go, that I may return to my own country.”