Joshua
Joshua 9:16ESV·traditional attribution

At the end of three days after they had made a covenant with them, they heard that they were their neighbors and that they lived among them.

John Calvin Reformed @genevareformer

16. And it came to pass, etc. The chastisement of their levity by the discovery of the fraud, three days after, must, by the swiftness of the punishment, have made them more sensible of the shame and disgrace. For it was thus known, that through sloth and lethargy, they had very stupidly fallen into error from not having taken the trouble to inquire into a...

Matthew Henry Presbyterian @wholebiblehenry

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

John Gill Reformed Baptist @doctorgill

And it came to pass at the end of three days, after they had made a league with them,.... The league seems to have been made the same day they came; the Gibeonites were no doubt in haste to have it concluded, lest they should be discovered; and Joshua, and the princes of Israel, took no pains, and gave themselves no great trouble to inquire...