Luke 6:33-35

33And if ye do good to those that do good to you, what thank is it to you? for even sinners do the same.

34And if ye lend to those from whom ye hope to receive, what thank is it to you? [for] even sinners lend to sinners that they may receive the like.

35But love your enemies, and do good, and lend, hoping for nothing in return, and your reward shall be great, and ye shall be sons of [the] Highest; for he is good to the unthankful and wicked.