Deuteronomy 23:8-10

Modern English Version

⁸ The children who are born of them may enter the assembly of the Lord in their third generation.

Uncleanness in the Camp

⁹ When the army goes out against your enemies, then keep yourself from every wicked thing. ¹⁰ If there be among you any man who is not clean because of a nocturnal emission, then he must leave the camp. He may not re-enter the camp.