Verses with the word copulation in the Old Testament (3 verses):
Leviticus 15:16
And if any man's seed of copulation go out from him, then he shall wash all his flesh in water, and be unclean until the even.
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 15:18
The woman also with whom man shall lie with seed of copulation, they shall both bathe themselves in water, and be unclean until the even.
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