Matthew 5:33-37

33Again, 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.

34But I say unto you, Do not swear at all; neither by the heaven, because it is [the] throne of 1God;

35nor by the earth, because it is [the] footstool of his feet; nor by Jerusalem, because it is [the] city of the great King.

36Neither shalt thou swear by thy head, because thou canst not make one hair white or black.

37But let your word be Yea, yea; Nay, nay; but what is more than these is from evil.