Jerome, on Matt 19:9

“And I say to you, that whosoever shall put away his wife, except it be for fornication, and shall marry another, committeth adultery: and he that shall marry her that is put away, committeth adultery.”

“It is fornication alone which destroys the relationship of the wife; for when she has divided one flesh into two, and has separated herself by fornication from her husband, she is not to be retained, lest she should bring her husband also under the curse, which Scripture has spoken, He that keepeth an adulteress is a fool and wicked. (Prov. 18:23.)”

Imported from an open dataset — not yet checked against the printed edition.