John Gill Commentary Leviticus 15:17

"And every garment, and every skin, whereon is the seed of copulation, shall be washed with water, and be unclean until the even." — Leviticus 15:17 (ASV)

And every garment, and every skin
Or that is made of skin, which a man wears, or lies upon, see (Leviticus 13:48) ; whereon is the seed of copulation ;
or on any other, for, as Gersom says, there is the same law concerning the rest of vessels, seeing this is a principal uncleanness, and defiles vessels; and perhaps the law makes mention of these, because it is more apt to be found on them: shall be washed with water, and be unclean until the even ;
see (Jude 1:23) .