Read Numbers 31:16 Using Other Translations
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.
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.
“These are the very ones who followed Balaam’s advice and caused the people of Israel to rebel against the LORD at Mount Peor. They are the ones who caused the plague to strike the LORD ’s people.