Joshua 14:6, 14

Now the people of Judah approached Joshua at Gilgal, and Caleb son of Jephunneh the Kenizzite said to him, “You know what the LORD said to Moses the man of God at Kadesh Barnea about you and me.

So Hebron has belonged to Caleb son of Jephunneh the Kenizzite ever since, because he followed the LORD, the God of Israel, wholeheartedly.