Leviticus 15:17
Any clothing or leather on which there is an emission of semen must be washed with water, and it will remain unclean until evening.
Berean Standard Bible
And every garment, and every skin, whereon is the seed of copulation, shall be washed with water, and be unclean until the even.
Every garment and every skin which the semen is on shall be washed with water, and be unclean until the evening.