A Treatise on the Soul and Its Origin, by Aurelius Augustin, Bishop of Hippo; in Four Books, Written Towards the End of 419 · Chapter 30
Secondly, of Marriage
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"We say," says he, "that that marriage which is now celebrated throughout the earth was ordained by God, and that married people are not guilty, but that fornicators and adulterers are to be condemned." This is true and catholic doctrine; but what you want to gather from this, to wit, that from the intercourse of male and female those who are born derive no sin to be put away by the laver of regeneration,—this is false and heretical.
Nicene and Post-Nicene Fathers, Series I, Volume 5, ed. Philip Schaff (1886–89). Public domain. Text from the Christian Classics Ethereal Library.