Tertullian

What harshness, therefore, is here on our part, if we renounce (communion with) such as do not the will of God? What heresy, if we judge second marriage, as being unlawful, akin to adultery? For what is adultery but unlawful marriage? The apostle sets a brand upon those who were wont entirely to forbid marriage, who were wont at the same time to lay an interdict on meats which God has created. We, however, no more do away with marriage if we abjure its repetition, than we reprobate meats if we fast oftener (than others).