Matthew 5
31 Ref It was said also, Whosoever shall put away his wife, let him give her a writing of divorcement:
32 Ref but I say unto you, that every one that putteth away his wife, saving for the cause of fornication, maketh her an adulteress: and whosoever shall marry her when she is put away committeth adultery.
33 Ref Again, ye have heard that it was said to them of old time, Thou shalt not forswear thyself, but shalt perform unto the Lord thine oaths: