Romans 14:1

Origen Against Celsus Book I

Celsus introduces the Jew disputing with Jesus, I resolved to prefix this preface to the beginning (of the treatise), in order that the reader of our reply to Celsus might fall in with it first, and see that this book has been composed not for those who are thorough believers, but for such as are either wholly unacquainted with the Christian faith, or for those who, as the apostle terms them, are "weak in the faith; "regarding whom he says, "Him that is weak in the faith receive ye."[13]

Cyprian Epistle LXXIII

If, then, she is the beloved and spouse who alone is sanctified by Christ, and alone is cleansed by His washing, it is manifest that heresy, which is not the spouse of Christ, nor can be cleansed nor sanctified by His washing, cannot bear sons to God.[15]