2 Samuel 5:4
King James Version
“David thirty years old when he began to reign, he reigned forty years.”
Context
1Then came all the tribes of Israel to David unto Hebron, and spake, saying, Behold, we thy bone and thy flesh.
2Also 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.
3So 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.
4David thirty years old when he began to reign, he reigned forty years.
5In Hebron he reigned over Judah seven years and six months: and in Jerusalem he reigned thirty and three years over all Israel and Judah.
6And the king and his men went to Jerusalem unto the Jebusites, the inhabitants of the land: which spake unto David, saying, Except thou take away the blind and the lame, thou shalt not come in hither: thinking, David cannot come in hither.
7Nevertheless David took the strong hold of Zion: the same the city of David.