Joshua 10:1-2

1Now it came to pass that Adoni-zedek king of Jerusalem heard that Joshua had taken Ai, and had utterly destroyed it—just as he had done to Jericho and its king, so he had done to Ai and its king—and that the inhabitants of Gibeon had made peace with Israel and remained among them.

2So he feared greatly, because Gibeon was a large city, as one of the royal cities—in fact, larger than Ai—and all its men were mighty.