1 John 2:19; 1 John 4:20; 1 John 5:3

1 John 2:19

19 They went out from us, but they did not really belong to us. For if they had belonged to us, they would have remained with us; but their going showed that none of them belonged to us.

1 John 4:20

20 Whoever claims to love God yet hates a brother or sister is a liar. For whoever does not love their brother and sister, whom they have seen, cannot love God, whom they have not seen.

1 John 5:3

3 In fact, this is love for God: to keep his commands. And his commands are not burdensome,