Leviticus 19:12 Lev. 19:12
And ye shall not swear by my name falsely, neither shalt thou profane the name of thy God: I am the LORD.
Matthew 5:33 Mt. 5:33
Again, ye have heard that it hath been said by them of old time, Thou shalt not forswear thyself, but shalt perform unto the Lord thine oaths:
(Quotation)