1 Kings 9:12

and they will answer, ‘Because they abandoned the LORD their God, who brought their fathers out of the land of Egypt, and embraced other gods, and worshiped them, and served them. Therefore the LORD has brought all this evil on them.’”

At the end of twenty years, in which Solomon had built the two houses, the LORD’s house and the king’s house

(now Hiram the king of Tyre had furnished Solomon with cedar trees and cypress trees, and with gold, according to all his desire), King Solomon gave Hiram twenty cities in the land of Galilee.

He said, “What cities are these which you have given me, my brother?” He called them the land of Cabul to this day.

Hiram sent to the king one hundred twenty talents of gold.

This is the reason of the forced labor which King Solomon conscripted: to build the LORD’s house, his own house, Millo, Jerusalem’s wall, Hazor, Megiddo, and Gezer.