All the leaders answered, “We have sworn an oath to them by the LORD, the God of Israel, and now we cannot touch them.
Here is, I. The treaty soon concluded with the Gibeonites, Jos 9:15. The thing was not done with much formality, but in short, 1. They agreed to let them live, and more the Gibeonites did not ask. In a common war this would have been but a small matter to be granted; but in the wars of Canaan, which were to make a general destruction...
Commenting on Joshua 9:15-21
But all the princes said to all the congregation,.... That is, all the princes that went to Gibeon addressed all the Israelites that were there: we have sworn unto them by the Lord God of Israel; by the Word of the Lord God, as the Targum; an oath is a solemn sacred thing, and not to be broken, and a good man will make conscience...
We have sworn unto them - Although the Israelites were deceived in this business, and the covenant was made on a certain supposition which was afterwards proved to have had no foundation in truth, and consequently the whole engagement on the part of the deceived was hereby vitiated and rendered null and void; yet, because the elders had eaten with them, offered a covenant sacrifice...