1 Kings 9:22
But of the sons of Israel, Solomon did not impose service, but they were men of war, or his slaves or his princes or his captains or rulers of his chariots or his horsemen.
Leviticus 25:39
And when thy brother becomes poor, being with thee, and if he should sell himself unto thee, thou shalt not compel him to serve as a slave.
1 Samuel 8:11-12
And he said, This will be the right of the king that shall reign over you: He will take your sons and appoint them for himself, for his chariots, and to be his horsemen, and some shall run before his chariot.
1 Kings 4:1-27
So king Solomon was king over all Israel.
2 Chronicles 8:9-10
But of the sons of Israel Solomon did not make slaves for his work, for they were men of war, and his princes and his captains, and princes of his chariots and horsemen.