וְעָבַ֨ר עָלָ֧יו רֽוּחַ־קִנְאָ֛ה וְקִנֵּ֥א אֶת־אִשְׁתּ֖וֹ וְהִ֣וא נִטְמָ֑אָה אוֹ־עָבַ֨ר עָלָ֤יו רֽוּחַ־קִנְאָה֙ וְקִנֵּ֣א אֶת־אִשְׁתּ֔וֹ וְהִ֖יא לֹ֥א נִטְמָֽאָה׃
그 더러워짐을 인하여 남편이 의심이 생겨서 그 아내를 의심하든지 또는 아내가 더럽히지 아니하였어도 그 남편이 의심이 생겨서 그 아내를 의심하거든
Mishneh Torah, Woman Suspected of Infidelity
The warning that is mentioned in the Torah - "And he warned his wife" - is that he tells her in the presence of witnesses, "Do not seclude yourself with Mr. so-and-so," even if that man is her father, her brother, a gentile, a slave, or an impotent person who cannot achieve an erection or produce children."