2 Samuel 5:4-6

Revised Standard Version

⁴ David was thirty years old when he began to reign, and he reigned forty years. ⁵ At Hebron he reigned over Judah seven years and six months; and at Jerusalem he reigned over all Israel and Judah thirty-three years.

Jerusalem Made Capital of the United Kingdom

⁶ And the king and his men went to Jerusalem against the Jeb′usites, the inhabitants of the land, who said to David, “You will not come in here, but the blind and the lame will ward you off”—thinking, “David cannot come in here.”