Leviticus 15:17

וְכָל־בֶּ֣גֶד וְכָל־ע֔וֹר אֲשֶׁר־יִהְיֶ֥ה עָלָ֖יו שִׁכְבַת־זָ֑רַע וְכֻבַּ֥ס בַּמַּ֖יִם וְטָמֵ֥א עַד־הָעָֽרֶב׃ פ

καὶ πᾶν ἱμάτιον κα πᾶν δέρμα ἐφ’ ὅ ἐὰν ᾖ ἐπ’ αὐτὸ κοίτη σπέρματος, καὶ πλυθήσεται ὕδατι κα ἀκάθαρτον ἔσται ἕως ἑσπέρας.

Greek text from Swete's edition, CC BY-SA 4.0

Y toda vestimenta, ó toda piel sobre la cual hubiere el derramamiento del semen, lavaráse con agua, y será inmunda hasta la tarde.

Any clothing or leather on which there is an emission of semen must be washed with water, and it will remain unclean until evening.