Matthew 5:34-36; Matthew 11:18
But I say unto you, Swear not at all; neither by heaven; for it is God's throne:
Nor by the earth; for it is his footstool : neither by Jerusalem; for it is the city of the great King.
Neither shalt thou swear by thy head, because thou canst not make one hair white or black.
For John came neither eating nor drinking , and they say , He hath a devil.