Joshua 9:19-21

but all the leaders answered, “We have given them our oath by the LORD, the God of Israel, and we cannot touch them now. This is what we will do to them: We will let them live, so that God’s wrath will not fall on us for breaking the oath we swore to them.” They continued, “Let them live, but let them be woodcutters and water carriers in the service of the whole assembly.” So the leaders’ promise to them was kept.