1 John 2:7

Dearly beloved, I am not writing you a new command, but an old one that you have had from the beginning. That old command is the message that you have heard.

1 John 3:11

it is so because the message that you have heard from the beginning is this: We should love one another.

2 John 1:5-6

And now I beg you, my lady, not as though I were writing you a new command, but one which we had from the beginning, that we continue to love one another.

Matthew 5:43

"You have heard that it was said, 'You must love your neighbor and hate your enemy.'

Matthew 22:37-40

And He answered him, "'You must love the Lord your God with your whole heart, your whole soul, and your whole mind.'

Mark 12:29-34

Jesus answered, "The first one is, 'Hear, O Israel, the Lord our God is one Lord,

Acts 17:19

So they took him and brought him to the city auditorium and said, "May we know what this new teaching of yours is?

Romans 13:8-10

Stop owing anybody anything, except the obligation to love one another, for whoever practices loving others has perfectly satisfied the law.

Galatians 5:13-14

For you, brothers, were called to freedom; only you must not let your freedom be an excuse for the gratification of your lower nature, but in love be slaves to one another.

James 2:8-12

But if you really observe the law of the King in accordance with the Scripture, "You must love your neighbor as you do yourself," you are doing right;

1 John 2:24

Let what you have heard from the beginning continue to live in your hearts; if you do, you will always remain in union with the Son and the Father.

1 John 3:23

His command is this, that we should believe in the name of His Son Jesus Christ and practice loving one another, just as He commanded us to do.

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
it is so because the message that you have heard from the beginning is this: We should love one another.
Acts 17:19
So they took him and brought him to the city auditorium and said, "May we know what this new teaching of yours is?
2 John 1:5
And now I beg you, my lady, not as though I were writing you a new command, but one which we had from the beginning, that we continue to love one another.

But

Matthew 5:43
"You have heard that it was said, 'You must love your neighbor and hate your enemy.'
Matthew 22:37
And He answered him, "'You must love the Lord your God with your whole heart, your whole soul, and your whole mind.'
Mark 12:29
Jesus answered, "The first one is, 'Hear, O Israel, the Lord our God is one Lord,
Romans 13:8
Stop owing anybody anything, except the obligation to love one another, for whoever practices loving others has perfectly satisfied the law.
Galatians 5:13
For you, brothers, were called to freedom; only you must not let your freedom be an excuse for the gratification of your lower nature, but in love be slaves to one another.
James 2:8
But if you really observe the law of the King in accordance with the Scripture, "You must love your neighbor as you do yourself," you are doing right;

General references

John 15:12
This is my command to you, to keep on loving one another as I have loved you.