1 Kings 11:14-20

Then the LORD stirred up an adversary against Solomon, Hadad the Edomite; he was of royal descent in Edom. For it came about, when David was in Edom, and Joab the commander of the army had gone up to bury those killed [in battle] and had struck down every male in Edom (for Joab and all [the army of] Israel stayed there six months, until he had killed every male in Edom), that Hadad escaped to Egypt, he and some Edomites from his father’s servants with him, while Hadad was [still] a little boy. They set out from Midian [south of Edom] and came to Paran, and took men with them from Paran and came to Egypt, to Pharaoh king of Egypt, who gave [young] Hadad a house and ordered food and provisions for him and gave him land. Hadad found great favor with Pharaoh, so that he gave Hadad in marriage the sister of his own wife, the sister of Tahpenes the queen. The sister of Tahpenes gave birth to Genubath, Hadad’s son, whom Tahpenes weaned in Pharaoh’s house; and Genubath was in Pharaoh’s household among the sons of Pharaoh.