Joshua 15:15-17

Then he went up from there to the inhabitants of Debir (formerly the name of Debir was Kirjath Sepher). And Caleb said, “He who attacks Kirjath Sepher and takes it, to him I will give Achsah my daughter as wife.” So Othniel the son of Kenaz, the brother of Caleb, took it; and he gave him Achsah his daughter as wife.