Matthew 5:46

Ἐὰν γὰρ ἀγαπήσητε τοὺς ἀγαπῶντας ὑμᾶς τίνα μισθὸν ἔχετε; οὐχὶ καὶ οἱ τελῶναι τὸ αὐτὸ ποιοῦσι;

For if you love those who love you, what reward have you? Do not even the tax collectors do the same?