Neither shalt thou swear by thy head, for thou canst not make one hair white or black.
And which of you by being anxious can add a cubit unto his stature?
And which of you by being anxious can add one cubit unto his stature?
nor by the earth, for it is the footstool of his feet; nor by Jerusalem, for it is the city of the great King.
But let your speech be, Yea, yea; Nay, nay: and whatsoever is more than these is of the evil one.