Joshua 9:16-18

But three days after the treaty had been made, the Israelites learned that they had been deceived. In fact, the Gibeonites were from the local area and lived nearby. So the Israelites set out at once, and on the third day, they came to their cities: Gibeon, Chephirah, Beeroth, and Kiriath Jearim. But the Israelites did not attack them because the leaders of the assembly had sworn an oath to them in the name of YAHWEH, the God of Israel. This caused Israel to grumble against their leaders