New Revised Standard Version
for they have harassed you by the trickery with which they deceived you in the affair of Peor, and in the affair of Cozbi, the daughter of a leader of Midian, their sister; she was killed on the day of the plague that resulted from Peor.”

New American Bible
for they have been your enemies by the deceitful dealings they had with you regarding Peor and their kinswoman Cozbi, the daughter of a Midianite prince, who was slain at the time of the plague because of Peor.

Douay-Rheims Bible
Because they also have acted like enemies against you, and have guilefully deceived you by the idol Phogor, and Cozbi their sister, a daughter of a prince of Madian, who was slain in the day of the plague for the sacrilege of Phogor.

Because they also have acted like enemies against you, and have guilefully deceived you by the idol Phogor, and Cozbi their sister, a daughter of a prince of Madian, who was slain in the day of the plague for the sacrilege of Phogor.

Numbers 25:1 And Israel at that time abode in Settim, and the people committed fornication with the daughters of Moab,

The sum of all Israel is taken in the plains of Moab
52 The law of dividing among them the inheritance of the land
57 The families and number of the Levites
63 None was left off them which were numbered at Sinai, but Caleb and Joshua

Numbers 25:9 And there were slain four and twenty thousand men.