Num 25:18

כִּ֣י צֹרְרִ֥ים הֵם֙ לָכֶ֔ם בְּנִכְלֵיהֶ֛ם אֲשֶׁר־נִכְּל֥וּ לָכֶ֖ם עַל־דְּבַר־פְּע֑וֹר וְעַל־דְּבַ֞ר כָּזְבִּ֨י בַת־נְשִׂ֤יא מִדְיָן֙ אֲחֹתָ֔ם הַמֻּכָּ֥ה בְיוֹם־הַמַּגֵּפָ֖ה עַל־דְּבַר־פְּעֽוֹר׃

For they assailed you deceitfully when they seduced you in the matter of Peor and their sister Cozbi, the daughter of the Midianite leader, the woman who was killed on the day the plague came because of Peor.”