Cross reference
Judges 1:11
11 And from there he went up against the people of Debir. (Now the name of Debir in earlier times was Kiriath-sepher.)
Joshua 15:15
15 From there he went up against the people of Debir: (now the name of Debir before that was Kiriath-sepher.)
Joshua 10:38-39
38 And Joshua and all Israel with him went on to make an attack on Debir;
39 And he took it, with its king and all its towns: and he put them to the sword, giving every person in it to the curse; all were put to death: as he had done to Hebron, so he did to Debir and its king.