Luke 6:32

and -- if ye love those loving you, what grace have ye? for also the sinful love those loving them;

Matthew 5:46-47

'For, if ye may love those loving you, what reward have ye? do not also the tax-gatherers the same?

1 Peter 2:19-20

for this is gracious, if because of conscience toward God any one doth endure sorrows, suffering unrighteously;

Treasury of Scripture Knowledge

Summary

For if ye love them which love you, what thank have ye? for sinners also love those that love them.

Bible References

If

Matthew 5:46
'For, if ye may love those loving you, what reward have ye? do not also the tax-gatherers the same?

What

1 Peter 2:19
for this is gracious, if because of conscience toward God any one doth endure sorrows, suffering unrighteously;