Matthew 5:33-37 - The Sermon On The Mount: Taking Oaths
33 Again, you have heard that it has been said by them of old time, You shall not perjure yourself, but shall perform unto the Lord your oaths: 34 But I say unto you, Swear not at all; neither by heaven; for it is God's throne: 35 Nor by the earth; for it is his footstool: neither by Jerusalem; for it is the city of the great King. 36 Neither shall you swear by your head, because you can not make one hair white or black. 37 But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these comes from evil.