Again, ye have heard that it has been said to the ancients, Thou shalt not forswear thyself, but shalt render to the Lord what thou hast sworn.
But *I* say unto you, Do not swear at all; neither by the heaven, because it is [the] throne of God;
nor by the earth, because it is [the] footstool of his feet; nor by Jerusalem, because 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.
But let your word be Yea, yea; Nay, nay; but what is more than these is from evil.
References for Matthew 5:37