2 In this we know that we love the children of God, whenever we love God and keep His commandments.
1 John 5:2 Cross References - WPNT
John 13:34-35
John 15:17
17 These things I command you so that you love one another.
1 John 2:5
5 But whoever keeps His Word, God’s love has truly been perfected in him: by this we know that we are in Him.
1 John 3:22-24
22 and whatever we may ask we receive from Him, because we keep His commandments and do the things that are pleasing in His sight.
23 Now this is His commandment, that we believe in the name of His Son, Jesus Christ, and love one another, just as He commanded.
24 He who keeps His commandments abides in Him, and He in him. This is how we know that He remains in us: by the Spirit whom He gave us.
1 John 4:21
21 Indeed, this commandment we have from Him: he who loves God must love his brother also.