“Neither shalt thou swear by thy head, because thou canst not make one hair white or black.”
King James Version (KJV)
5:36 For thou canst not make one hair white or black - Whereby it appears, that this also is not thine but God's.
Mt 5:36 By thy head. Senseless, since the oath could have no meaning. Dr. Thompson ("The Land and the Book") says the Orientals are still terribly profane, swearing continually by the head, the beard, the heart, the temple, the church.