But Onan knew that the offspring wouldn't be his own heir, so whenever he had sexual relations with his brother's wife, he would spill his semen on the ground to avoid fathering offspring for his brother.

And if any man's semen go out from him, then he shall wash all his flesh in water, and be unclean until the evening.

And every garment, and every skin, on which is the semen, shall be washed with water, and be unclean until the evening.

The woman also with whom man shall lie and have an emission of semen, they shall both bathe themselves in water, and be unclean until the evening.

This is the law of him that has a discharge, and of him who has an emission of semen, and is unclean thereby;

" 'And when a man lies with a woman [and there is] an emission of semen and she [is] a female slave promised to a man, but she indeed has not been ransomed or freedom has not be given to her, [there] shall be an obligation to compensate; they shall not be put to death, because she has not been freed.

Whatsoever man of the descendants of Aaron who is a leper, or has a discharge; he shall not eat of the holy things, until he is clean. And whoever touches any thing that is defiled by a dead body, or a man who has had an emission of semen;

But if you have gone aside, being under your husband, and if you are defiled and some man besides your husband has given his semen to you,