Parallel
1 John 4:21
Nestle 1904 Greek New Testament · Berean Standard Bible
καὶ ταύτην τὴν ἐντολὴν ἔχομεν ἀπ’ αὐτοῦ ἵνα ὁ ἀγαπῶν τὸν Θεὸν ἀγαπᾷ καὶ τὸν ἀδελφὸν αὐτοῦ
And we have this commandment from Him: Whoever loves God must love his brother as well.