1 John 4:20-5:2

ISV(i) 20 Whoever says, “I love God,” but hates his brother is a liar. The one who does not love his brother whom he has seen cannot love the God whom he has not seen. 21 And this is the commandment that we have from him: the person who loves God must also love his brother.
5 1 Faith Overcomes the WorldEveryone who believes that Jesus is the Messiah has been born from God, and everyone who loves the parent also loves the child. 2 This is how we know that we love God’s children: we love God and keep his commandments.