2 Samuel 2:1, 3, 11

And it came to pass after this, that David inquired of Jehovah, saying, Shall I go up into any of the cities of Judah? And Jehovah said unto him, Go up. And David said, Whither shall I go up? And he said, Unto Hebron.

And his men that were with him did David bring up, every man with his household: and they dwelt in the cities of Hebron.

And the time that David was king in Hebron over the house of Judah was seven years and six months.