Luke 6:33

31 And as ye would that men should do to you, do ye also to them likewise.

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

And if ye do good to them which do good to you, what thank have ye? for sinners also do even the same.

34 And if ye lend to them of whom ye hope to receive, what thank have ye? for sinners also lend to sinners, to receive as much again.

35 But love ye your enemies, and do good, and lend, hoping for nothing again; and your reward shall be great, and ye shall be the children of the Highest: for he is kind unto the unthankful and to the evil.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
If you do good to those who do good to you, what credit is that to you? Even sinners do the same.
KJV
And if ye do good to them which do good to you, what thank have ye? for sinners also do even the same.
WEB
If you do good to those who do good to you, what credit is that to you? For even sinners do the same.
ASV
And if ye do good to them that do good to you, what thank have ye? for even sinners do the same.
DARBY
And if ye do good to those that do good to you, what thank is it to you? for even sinners do the same.
BLB
For even if you⁺ do good to those doing good to you⁺, what grace is it to you⁺? Even the sinners do the same.
ÅB
Og om dere gjør vel imot dem som gjør vel imot dere, hva er det å takke dere for? Også syndere gjør det samme.
OTB
Og hvis du gjør godt mot dem som gjør godt mot deg, hva slags fortjeneste er det for deg? Selv de som ikke er rettferdige gjør det samme.
B1930
Og om I gjør vel imot dem som gjør vel imot eder, hvad er det å takke eder for? Også syndere gjør det samme.

Study notes (Tyndale)

Original text and word study