John Calvin on Matthew 5:32

32. Causeth her to commit adultery. As the bill of divorcement bore, that the woman had been loosed from her former husband, and might enter into a new marriage, the man who, unjustly and unlawfully, abandons the wife whom God had given him, is justly condemned for having prostituted his wife to others.

MATTHEW 5:33-37

Matthew 5:33-37

33. Again, ye have heard that it was said to the ancients, Thou shalt not perjure thyself: but thou shalt perform to the Lord what thou hast sworn. 34. But I charge you, swear not at all: neither by heaven, for it is the throne of God: 35. Nor by the earth, for it is his footstool: nor by Jerusalem, for it is the city of the great King: 36. Nor shalt thou swear by thy head: for thou canst not make one hair white or black. 37. But your speech shall be, Yes, yes; No, no for what is beyond these comes from evil. “Du mal, ou, malin, ou meschant,” (James 5:12;)—”from evil, or, malignant, or wicked.”