1 John 4:21
This commandment we have from him, that he who loves God should also love his brother.
World English Bible (Public Domain)
In context
Before · 1 John 4:19–20
19We love him, because he first loved us. 20If a man says, “I love God,” and hates his brother, he is a liar; for he who doesn’t love his brother whom he has seen, how can he love God whom he has not seen?
21This commandment we have from him, that he who loves God should also love his brother.