Matthew 5:39 (KJV)

But I say unto you, Swear not at all; neither by heaven; for it is God's throne:

Nor by the earth; for it is his footstool: neither by Jerusalem; for 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 communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil.

Ye have heard that it hath been said, An eye for an eye, and a tooth for a tooth:

And if any man will sue thee at the law, and take away thy coat, let him have thy cloak also.

And whosoever shall compel thee to go a mile, go with him twain.

Give to him that asketh thee, and from him that would borrow of thee turn not thou away.

Ye have heard that it hath been said, Thou shalt love thy neighbour, and hate thine enemy.

But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;