Matthew 5:43 – 44
King James Version (KJV)
43 Ye have heard that it hath been said, Thou shalt love thy neighbour, and hate thine enemy.
44 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;
From BibleGateway.com: http://www.biblegateway.com/passage/?search=Matthew 5:43 – 44&version=KJV