1 John 3:11

for this is the injunction which ye heard from the beginning, that we should love one another: not as Cain who was of the evil one, and slew his brother;

1 John 1:5

Now this we have heard from Him, and declare unto you, that God is light, and in Him there is no darkness at all.

2 John 1:5

And now I beseech thee, Lady, not as writing to thee a new commandment, but that which we had from the beginning, that we may love one another.

John 13:34-35

A new commandment I give unto you, That ye love one another; ---as I have loved you, that ye also love one another: for by this shall all men know that ye are my disciples,

John 15:12

This is my commandment, that ye love one another, as I have loved you.

1 John 4:7

Beloved, let us love one another: for love is from God; and every one that loveth is born of God, and knoweth God.

1 John 4:21

And we have this commandment from Him, that he, who loveth God, should love his brother also.

Galatians 6:2

Bear one another's burdens, and so fulfil the law of Christ.

Ephesians 5:2

even as Christ hath loved us, and given Himself up for us, an offering and a sacrifice to God for an odor of sweet perfume.

1 Thessalonians 4:9

But as to brotherly love, ye need not that I write unto you; for ye yourselves are taught of God to love one another.

1 Timothy 1:5

so do, and acquaint them that the end of that charge is charity, out of a pure heart, and a good conscience, and faith unfeigned:

1 Peter 1:22

Having therefore purified your souls by obedience to the truth, through the Spirit, to brotherly love unfeigned, love one another with a pure heart fervently:

1 Peter 3:8

Finally, my beloved, be unanimous, be sympathizing, love as brethren, be compassionate, be courteous:

1 Peter 4:8

having above all things fervent love to each other; for love will cover a multitude of sins.

1 John 2:7-8

Brethren, I write not a new commandment unto you, but an old commandment which ye had from the beginning: the old commandment is the word which ye have heard from the beginning:

Treasury of Scripture Knowledge

Summary

For this is the message that ye heard from the beginning, that we should love one another.

General references

Bible References

This

1 John 1:5
Now this we have heard from Him, and declare unto you, that God is light, and in Him there is no darkness at all.
1 John 2:7
Brethren, I write not a new commandment unto you, but an old commandment which ye had from the beginning: the old commandment is the word which ye have heard from the beginning:

That we

1 John 4:7
Beloved, let us love one another: for love is from God; and every one that loveth is born of God, and knoweth God.
John 13:34
A new commandment I give unto you, That ye love one another; ---as I have loved you, that ye also love one another: for by this shall all men know that ye are my disciples,
John 15:12
This is my commandment, that ye love one another, as I have loved you.
Galatians 6:2
Bear one another's burdens, and so fulfil the law of Christ.
Ephesians 5:2
even as Christ hath loved us, and given Himself up for us, an offering and a sacrifice to God for an odor of sweet perfume.
1 Thessalonians 4:9
But as to brotherly love, ye need not that I write unto you; for ye yourselves are taught of God to love one another.
1 Peter 1:22
Having therefore purified your souls by obedience to the truth, through the Spirit, to brotherly love unfeigned, love one another with a pure heart fervently:
1 Peter 3:8
Finally, my beloved, be unanimous, be sympathizing, love as brethren, be compassionate, be courteous:
1 Peter 4:8
having above all things fervent love to each other; for love will cover a multitude of sins.
2 John 1:5
And now I beseech thee, Lady, not as writing to thee a new commandment, but that which we had from the beginning, that we may love one another.

General references

John 13:35
if ye have mutual love to each other.
1 John 4:21
And we have this commandment from Him, that he, who loveth God, should love his brother also.