1 Kings 11:20-21

20Tahpenes’s sister gave birth to Hadad’s son Genubath. Tahpenes herself weaned him in Pharaoh’s palace, and Genubath lived there along with Pharaoh’s sons.

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