1 John 4:21

Καὶ ταύτην τὴν ἐντολὴν ἔχομεν ἀπ' αὐτοῦ, ἵνα ὁ ἀγαπῶν τὸν Θεόν, ἀγαπᾷ καὶ τὸν ἀδελφὸν αὐτοῦ.

Kai taytēn tēn entolēn echomen ap' aytoy, ina o agapōn ton Theon, agapa kai ton adelphon aytoy.

King James Version (KJV)

And this commandment have we from him, That he who loveth God love his brother also.

Modern English

And he has given us this command: Anyone who loves God must also love their brother and sister.