Judges 1:9
"And afterward the children of Judah went down to fight against the Canaanites, that dwelt in the mountain, and in the south, and in the valley."
Cross References (ranked by relevance)
Joshua 10:36
And Joshua went up from Eglon, and all Israel with him, unto Hebron; and they fought against it:
Joshua 11:21
And at that time came Joshua, and cut off the Anakims from the mountains, from Hebron, from Debir, from Anab, and from all the mountains of Judah, and from all the mountains of Israel: Joshua destroyed them utterly with their cities.