2 Samuel 5:2-4

King James Version

² Also in time past, when Saul was king over us, thou wast he that leddest out and broughtest in Israel: and the Lord said to thee, Thou shalt feed my people Israel, and thou shalt be a captain over Israel.

³ So all the elders of Israel came to the king to Hebron; and king David made a league with them in Hebron before the Lord: and they anointed David king over Israel.

⁴ David was thirty years old when he began to reign, and he reigned forty years.