Luke 6:33

33Andκαὶifἐὰνyou do goodἀγαθοποιῆτεto thoseτοὺςdoing good toἀγαθοποιοῦνταςyouὑμᾶς,whatποίαto youὑμῖνcreditχάριςis itἐστίν;For evenκαὶοἱsinnersἁμαρτωλοὶtheτὸsameαὐτὸdoποιοῦσιν.

For even if you⁺ do good to those doing good to you⁺, what grace is it to you⁺? Even the sinners do the same.