You may not take an oath by your head, because you are not able to make one hair white or black.
Or by the earth, because it is the resting-place for his foot; or by Jerusalem, because it is the town of the great King.
But let your words be simply, Yes or No: and whatever is more than these is of the Evil One.
And which of you by taking thought is able to make himself a cubit taller?
And which of you by taking thought is able to make himself any taller?