1 John 2:7

Beloved, I write not a new commandment to you, but an old commandment, which you had from the beginning; the old commandment is the word which you heard.

1 John 3:11

For this is the message which you heard from the beginning; that we should love one another;

2 John 1:5-6

And now I beseech you, Curia, not as if writing a new commandment to you, but [one] which we had from the beginning, that we should love one another.

Matthew 5:43

You have heard that it was said, You shall love your neighbor, and hate your enemy.

Matthew 22:37-40

And he said to him, You shall love the Lord your God with all your heart, and all your soul, and all your mind.

Mark 12:29-34

Jesus answered, First is, Hear Israel, the Lord our God is one Lord;

Acts 17:19

And laying hold of him they brought him to the Areopagus, saying, May we know what this new teaching is which is taught by you?

Romans 13:8-10

Owe no man any thing, except to love one another; for he that loves another has fully performed the law.

Galatians 5:13-14

For you are called to liberty, brothers, only make not your liberty an occasion for the flesh, but by love serve one another.

James 2:8-12

If you keep indeed the royal law according to the Scripture, You shall love your neighbor as yourself, you do well;

1 John 2:24

Let that which you heard from the beginning continue in you. If that which you heard from the beginning continues in you, you also shall continue in the Son and in the Father.

1 John 3:23

And this is his commandment; that we should believe in the name of his Son Jesus Christ, and love one another as he gave commandment.

Treasury of Scripture Knowledge

Summary

Brethren, I write no 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.

General references

Bible References

I write

1 John 3:11
For this is the message which you heard from the beginning; that we should love one another;
Acts 17:19
And laying hold of him they brought him to the Areopagus, saying, May we know what this new teaching is which is taught by you?
2 John 1:5
And now I beseech you, Curia, not as if writing a new commandment to you, but [one] which we had from the beginning, that we should love one another.

But

Matthew 5:43
You have heard that it was said, You shall love your neighbor, and hate your enemy.
Matthew 22:37
And he said to him, You shall love the Lord your God with all your heart, and all your soul, and all your mind.
Mark 12:29
Jesus answered, First is, Hear Israel, the Lord our God is one Lord;
Romans 13:8
Owe no man any thing, except to love one another; for he that loves another has fully performed the law.
Galatians 5:13
For you are called to liberty, brothers, only make not your liberty an occasion for the flesh, but by love serve one another.
James 2:8
If you keep indeed the royal law according to the Scripture, You shall love your neighbor as yourself, you do well;

General references

John 15:12
This is my commandment, that you love one another as I have loved you.