Therefore if you bring your gift to the altar, and there remember that your brother has something against you, leave your gift there before the altar, and go your way. First be reconciled to your brother, and then come and offer your gift. Matthew 5:23-24

Or do you not know that he who is joined to a harlot is one body with her? For “the two,” He says, “shall become one flesh.” BUT HE WHO IS JOINED TO THE LORD IS ONE SPIRIT WITH HIM. 1 Corinthians 6:16-17