Numbers 31:16

Behold , these , on Balaam’s advice , caused the people of Israel to act treacherously against the Lord in the incident of Peor , and so the plague came among the congregation of the Lord .

“They were the ones who followed Balaam`s advice and enticed the Israelites to be unfaithful to the Lord in the Peor incident, so that a plague struck the Lord`s people.

Behold, these caused the children of Israel, through the counsel of Balaam, to commit trespass against the Lord in the matter of Peor, and there was a plague among the congregation of the Lord.