For if ye love them which love you, what reward have ye? do not even the publicans the same?
And if you salute your bretheren only, what do ye more than others? do not even publicans so?
Be ye therefore perfect, even as your Father which is in heaven is perfect.
(Matthew 5:43-48)
But love ye your enemies... and ye shall be the children of the Highest:
for he is kind unto the unthankful and to the evil. Be ye therefore merciful,
as your Father also is merciful. Judge not, and ye shall not be judged,
condemn not, and ye shall not be condemned: forgive, and ye shall be forgiven.
(Luke 6:35-37)