Now Adoni-Zedek king of Jerusalem heard that Joshua had taken Ai and totally destroyed it, doing to Ai and its king as he had done to Jericho and its king, and that the people of Gibeon had made a treaty of peace with Israel and had become their allies.
References for Joshua 10:1
He and his people were very much alarmed at this, because Gibeon was an important city, like one of the royal cities; it was larger than Ai, and all its men were good fighters.
So Adoni-Zedek king of Jerusalem appealed to Hoham king of Hebron, Piram king of Jarmuth, Japhia king of Lachish and Debir king of Eglon.
References for Joshua 10:3
“Come up and help me attack Gibeon,” he said, “because it has made peace with Joshua and the Israelites.”
References for Joshua 10:4
Then the five kings of the Amorites—the kings of Jerusalem, Hebron, Jarmuth, Lachish and Eglon—joined forces. They moved up with all their troops and took up positions against Gibeon and attacked it.
References for Joshua 10:5