Cross reference
Judges 1:11
11 And from thence he went against the inhabitants of Debir: and the name of Debir before was Kirjathsepher:
Joshua 15:15
15 And he went up thence to the inhabitants of Debir: and the name of Debir before was Kirjathsepher.
Joshua 10:38-39
38 And Joshua returned, and all Israel with him, to Debir; and fought against it:
39 And he took it, and the king thereof, and all the cities thereof; and they smote them with the edge of the sword, and utterly destroyed all the souls that were therein; he left none remaining: as he had done to Hebron, so he did to Debir, and to the king thereof; as he had done also to Libnah, and to her king.