5 Now I beg you, dear lady, not as though I wrote to you a new commandment, but that which we had from the beginning, that we love one another.
2 John 1:5 Cross References - WEB
John 13:34-35
John 15:12
12 “This is my commandment, that you love one another, even as I have loved you.
Galatians 5:22
22 But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faith,
Ephesians 5:2
2 Walk in love, even as Christ also loved us and gave himself up for us, an offering and a sacrifice to God for a sweet-smelling fragrance.
1 Thessalonians 4:9
9 But concerning brotherly love, you have no need that one write to you. For you yourselves are taught by God to love one another,
Hebrews 13:1
1 Let brotherly love continue.
1 Peter 1:22-23
1 Peter 4:8
8 And above all things be earnest in your love among yourselves, for love covers a multitude of sins.
2 Peter 1:7
7 and in godliness brotherly affection; and in brotherly affection, love.
1 John 2:7-8
7 Brothers, I write no new commandment to you, but an old commandment which you had from the beginning. The old commandment is the word which you heard from the beginning.
8 Again, I write a new commandment to you, which is true in him and in you; because the darkness is passing away and the true light already shines.
1 John 3:11
11 For this is the message which you heard from the beginning, that we should love one another;
1 John 3:14-18
14 We know that we have passed out of death into life, because we love the brothers. He who doesn’t love his brother remains in death.
15 Whoever hates his brother is a murderer, and you know that no murderer has eternal life remaining in him.
16 By this we know love, because he laid down his life for us. And we ought to lay down our lives for the brothers.
17 But whoever has the world’s goods and sees his brother in need, then closes his heart of compassion against him, how does God’s love remain in him?
18 My little children, let’s not love in word only, or with the tongue only, but in deed and truth.
1 John 3:23
23 This is his commandment, that we should believe in the name of his Son, Jesus Christ, and love one another, even as he commanded.
1 John 4:7-12
7 Beloved, let’s love one another, for love is of God; and everyone who loves has been born of God, and knows God.
8 He who doesn’t love doesn’t know God, for God is love.
9 By this God’s love was revealed in us, that God has sent his one and only Son into the world that we might live through him.
10 In this is love, not that we loved God, but that he loved us, and sent his Son as the atoning sacrifice for our sins.
11 Beloved, if God loved us in this way, we also ought to love one another.
12 No one has seen God at any time. If we love one another, God remains in us, and his love has been perfected in us.
1 John 4:20
20 If 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?