Mark 10:11

μοιχᾶται ἐπʼ αὐτήν. Committeth adultery against her. In answering the Pharisees it sufficed to point out that, from a higher point of view than that of the Mosaic Law, divorce was a falling away from the ideal of marriage set before mankind at the Creation, an ideal which ought to be restored. In answering His disciples He goes further and declares that marrying another after divorce is adultery, which implies that divorce is no real dissolution of the marriage tie. Gould holds that the exception in Matthew 19:9 is implied here, “because adultery is the real dissolution of the marriage tie. Formal divorce does not break the marriage tie, adultery does break it.” Μοιχάομαι in N.T. occurs only in the passages in Mk (Mark 10:11-12) and Mt. (Matthew 5:32; Matthew 19:9) which treat of divorce; the usual verb is μοιχεύω (Mark 10:19), act. of the husband, pass. of the wife.