Neither shalt thou swear by thy head, because thou canst not make one hair white or black.
But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil.Matthew 5:37 KJV
Nor by the earth; for it is his footstool: neither by Jerusalem; for it is the city of the great King.Matthew 5:35 KJV