Joshua 10:1-2

1When Adoni-zedek king of Jerusalem heard that Joshua had captured Ai, and had utterly destroyed it—as he had done to Jericho and its king, so he had done to Ai and its king—and that the residents of Gibeon had made peace with Israel and were [living] among them,

2he [and his people] feared greatly, because Gibeon was a great city, like one of the royal cities, and because it was greater than Ai, and all its men were mighty.