וְכָל־בֶּ֣גֶד וְכָל־ע֔וֹר אֲשֶׁר־יִהְיֶ֥ה עָלָ֖יו שִׁכְבַת־זָ֑רַע וְכֻבַּ֥ס בַּמַּ֖יִם וְטָמֵ֥א עַד־הָעָֽרֶב׃ (פ)
Y toda vestimenta, ó toda piel sobre la cual hubiere el derramamiento del semen, lavaráse con agua, y será inmunda hasta la tarde.
Chizkuni
אשר יהיה עליו שכבת זרע, “(garments or skin) which have been splattered with semen of a human being;” even only partially; (Sifra) just as when this subject was discussed previously it referred to fresh, moist semen, so here too the Torah speaks of freshly emitted semen, not dried out semen.