Matthew 19:6

First Apology of Justin

And when a certain man came to Him and said, "Good Master," He answered and said, "There is none good but God only, who made all things."[31]

Clement of Alexandria Stromata Book III

Quid enim? annon licet etiam continenter uti matrimonio, et non conari dissolvere, quod "conjunxit Deus? "[53]

Clement of Alexandria Stromata Book III

Primum quidem, propriam sponsam habuit Ecclesiam: deinde vero, nec homo erat communis, ut opus haberet etiam adjutore aliquo secundum carnem; neque erat ei necesse procreare filios, qui manet in aeternum, et natus est solus Dei Filius. Hic ipse autem Dominus dicit: "Quod Deus conjunxit, homo ne separet."[60]

Clement of Alexandria Stromata Book III

Quomodo autem vetus quidera est solum matrimonium et legis inventum, alienum autem est, quod est ex Domino, matrimonium, cum idem Deus servetur a nobis? "Non" enim"quod Deus conjunxit, homo" jure"dissolverit; "[143]

Tertullian On Monogamy

And accordingly, those whom God "from the beginning" conjoined, "two into one flesh," man shall not at the present day separate.[26]

Constitutions of the Holy Apostles Book VI

For the Lord says: "What God has joined together, let no man put asunder."[76]

Origen Commentary on Matthew Book XIV

And, as tending to convince them that theyshould not put away their wife for every cause, is it said," What God hath joined together, let notman put asunder."[129]