Joshua 9:19-21

19All the leaders answered them, “We have sworn an oath to them by the Lord, the God of Israel, and now we cannot touch them.

20This is how we will treat them: we will let them live, so that no wrath will fall on us because of the oath we swore to them.”

21They also said, “Let them live.” So the Gibeonites became woodcutters and water carriers for the whole community, as the leaders had promised them.