2 Samuel 5:3

Then came all the tribes of Israel to David unto Hebron, and spake, saying, Behold, we are thy bone and thy flesh.

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.

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

In Hebron he reigned over Judah seven years and six months: and in Jerusalem he reigned thirty and three years over all Israel and Judah.