Luke 6:32-35

And if ye love them that love you, what thank have ye? for even sinners love those that love them. And if ye do good to them that do good to you, what thank have ye? for even sinners do the same. And if ye lend to them of whom ye hope to receive, what thank have ye? even sinners lend to sinners, to receive again as much. But love your enemies, and do them good, and lend, never despairing; and your reward shall be great, and ye shall be sons of the Most High: for he is kind toward the unthankful and evil.