Now it happened at the end of twenty years, when Solomon had built the two houses, the house of the LORD and the king's house
1 Kings 9:10
Surrounding context
9:9 Then they will answer, "Because they forsook the LORD their God, who brought their fathers out of the land of Egypt, and have embraced other gods, and worshiped them and served them; therefore the LORD has brought all this calamity on them."'
9:10 Now it happened at the end of twenty years, when Solomon had built the two houses, the house of the LORD and the king's house
9:11 (Hiram the king of Tyre had supplied Solomon with cedar and cypress and gold, as much as he desired), that King Solomon then gave Hiram twenty cities in the land of Galilee.