Neither shalt thou swear by thy head, because thou canst not make one hair white or black.
And which of you, by taking thought, can add to his stature one cubit?
And which of you by taking thought, can add to his stature by one cubit?
Nor by the earth, for it is his footstool: nor by Jerusalem, for it is the city of the great king:
But let your speech be yea, yea: no, no: and that which is over and above these, is of evil.