Were slain by them — This was recorded before, Numbers 31:8, and is here repeated, because the defeating of Balaam's purpose to curse Israel, and the turning that curse into a blessing, was such an instance of the power and goodness of God, as was fit to be had in everlasting remembrance.
Related Commentaries of Joshua 13:22
Joshua 13:22
22 Balaam also the son of Beor, the soothsayer,d did the children of Israel slay with the sword among them that were slain by them.