Joshua 15:15-17

Then he went up from there against the inhabitants of Debir; now the name of Debir formerly was Kiriath-sepher. And Caleb said, “The one who attacks Kiriath-sepher and captures it, I will give him Achsah my daughter as a wife.” Othniel the son of Kenaz, the brother of Caleb, captured it; so he gave him Achsah his daughter as a wife.