Matthew adds, for every cause, that is, for any cause, unless for adultery, for so the Pharisees had interpreted the law permitting divorce, Deuteronomy 24:1, taking advantage of those words, that she find no favour in his eyes, and interpreting the term uncleanness following, of any deformity, or other cause of dislike.
Related Commentaries of Mark 10:2
Mark 10:2
2 And the Pharisees came to him, and asked him, Is it lawful for a man to put away his wife? tempting him.