1 Kings 11:20-22 NIV

20 The sister of Tahpenes bore him a son named Genubath, whom Tahpenes brought up in the royal palace. There Genubath lived with Pharaoh's own children.
21 While he was in Egypt, Hadad heard that David rested with his fathers and that Joab the commander of the army was also dead. Then Hadad said to Pharaoh, "Let me go, that I may return to my own country."
22 "What have you lacked here that you want to go back to your own country?" Pharaoh asked. "Nothing," Hadad replied, "but do let me go!"