Allusion for Leviticus 15:32

זֹ֥את תּוֹרַ֖ת הַזָּ֑ב וַאֲשֶׁ֨ר תֵּצֵ֥א מִמֶּ֛נּוּ שִׁכְבַת־זֶ֖רַע לְטָמְאָה־בָֽהּ׃

This is the law of him that hath an issue, and of him from whom the flow of seed goeth out, so that he is unclean thereby;