By the spirit, if not by the letter, of the Law, Solomon had no right to give away these cities, or any part of the inheritance of Israel Leviticus 25:13-34. But the exigences of a worldly policy caused the requirements of the Law to be set aside.
Related Commentaries of 1 Kings 9:11
1 Kings 9:11
11 (Now Hiram the king of Tyre had furnished Solomon with cedar trees and fir trees, and with gold, according to all his desire,) that then king Solomon gave Hiram twenty cities in the land of Galilee.