2 John 1:5

Now I ask you, lady, not as if I were writing to you a new commandment, but [simply reminding you of] the one which we have had from the beginning, that we love and unselfishly seek the best for one another.

1 John 3:11

For this is the message which you [believers] have heard from the beginning [of your relationship with Christ], that we should [unselfishly] love and seek the best for one another;

John 13:34-35

I am giving you a new commandment, that you love one another. Just as I have loved you, so you too are to love one another.

John 15:12

“This is My commandment, that you love and unselfishly seek the best for one another, just as I have loved you.

Galatians 5:22

But the fruit of the Spirit [the result of His presence within us] is love [unselfish concern for others], joy, [inner] peace, patience [not the ability to wait, but how we act while waiting], kindness, goodness, faithfulness,

Ephesians 5:2

and walk continually in love [that is, value one another—practice empathy and compassion, unselfishly seeking the best for others], just as Christ also loved you and gave Himself up for us, an offering and sacrifice to God [slain for you, so that it became] a sweet fragrance.

1 Thessalonians 4:9

Now concerning brotherly love, you have no need for anyone to write you, for you have been [personally] taught by God to love one another [that is, to have an unselfish concern for others and to do things for their benefit].

Hebrews 13:1

Let love of your fellow believers continue.

1 Peter 1:22-23

Since by your obedience to the truth you have purified yourselves for a sincere love of the believers, [see that you] love one another from the heart [always unselfishly seeking the best for one another],

1 Peter 4:8

Above all, have fervent and unfailing love for one another, because love covers a multitude of sins [it overlooks unkindness and unselfishly seeks the best for others].

2 Peter 1:7

and in your godliness, brotherly affection, and in your brotherly affection, [develop Christian] love [that is, learn to unselfishly seek the best for others and to do things for their benefit].

1 John 2:7-8

Beloved, I am not writing a new commandment to you, but an old commandment which you have had from the beginning; the old commandment is the message which you have heard [before from us].

1 John 3:14-18

We know that we have passed out of death into Life, because we love the brothers and sisters. He who does not love remains in [spiritual] death.

1 John 3:23

This is His commandment, that we believe [with personal faith and confident trust] in the name of His Son Jesus Christ, and [that we unselfishly] love and seek the best for one another, just as He commanded us.

1 John 4:7-12

Beloved, let us [unselfishly] love and seek the best for one another, for love is from God; and everyone who loves [others] is born of God and knows God [through personal experience].

1 John 4:20

If anyone says, “I love God,” and hates (works against) his [Christian] brother he is a liar; for the one who does not love his brother whom he has seen, cannot love God whom he has not seen.

Treasury of Scripture Knowledge

Summary

And now I beseech thee, lady, not as though I wrote a new commandment unto thee, but that which we had from the beginning, that we love one another.

General references

Bible References

Not

1 John 2:7
Beloved, I am not writing a new commandment to you, but an old commandment which you have had from the beginning; the old commandment is the message which you have heard [before from us].
1 John 3:11
For this is the message which you [believers] have heard from the beginning [of your relationship with Christ], that we should [unselfishly] love and seek the best for one another;

General references

Hebrews 13:1
Let love of your fellow believers continue.