Midrasch zu Jehoschua 9:1

and the number of the people of Ai that were slain, men and women, was twelve thousand. ‎And when all the kings of Canaan on this side of the Jordan, heard of the evil which the ‎Israelites had done unto Jericho and unto Ai, they assembled to fight against Israel. But the ‎inhabitants of Gibeon were greatly afraid to fight with the Israelites, and they acted cunningly, ‎and they came unto Joshua and unto all Israel, and they said unto them: We are coming from a ‎distant land, and we pray you to cut a covenant with us. And the children of Israel made a ‎covenant of peace with them, and the princes of the congregation swore unto them. And the ‎children of Israel learned soon that the Gibeonites lived quite near and in the midst of their ‎own land, but the children of Israel did not slay them, for they had sworn unto them by the ‎Lord, and they made the Gibeonites hewers of wood and drawers of water. And Joshua said ‎unto them: Wherefore have ye beguiled us, saying: We are very far from you; when ye dwelt ‎in our midst? And they said: Because it hath been told unto thy servants, all that you have ‎done unto the kings of the Amorites, and we were greatly afraid of our lives, wherefore we ‎have done this thing. And Joshua made them that day hewers of wood and drawers of water, ‎and he divided them for slaves amongst the tribes of Judah. And Adonizedek, king of ‎Jerusalem, heard this thing, and he sent to Hoham, king of Hebron, and to Piram, king of ‎Jarmuth, and to Japhia, king of Lachish, and to Debir, king of Eglon, and all these five kings of ‎the Amorites assembled, and encamped before Gibeon to fight with the people of Gibeon. ‎And the inhabitants of Gibeon sent unto Joshua, saying: Hasten to help us, for all the kings of ‎the Amorites have come to fight against us. And Joshua came up with his host from Gilead, ‎and he smote the five kings in a terrible smiting, and they fled from before Israel.‎