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, even as he gave us commandment.

John 6:29

Jesus answered and said unto them, This is the work of God, that ye believe on him whom he hath sent.

John 13:34

A new commandment I give unto you, that ye love one another; even as I have loved you, that ye also love one another.

John 15:12

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

1 John 3:11

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

Deuteronomy 18:15-19

Jehovah thy God will raise up unto thee a prophet from the midst of thee, of thy brethren, like unto me; unto him ye shall hearken;

Psalm 2:12

Kiss the son, lest he be angry, and ye perish in the way, For his wrath will soon be kindled. Blessed are all they that take refuge in him.

Matthew 22:39

And a second like unto it is this, Thou shalt love thy neighbor as thyself.

Mark 9:7

And there came a cloud overshadowing them: and there came a voice out of the cloud, This is my beloved Son: hear ye him.

John 14:1

Let not your heart be troubled: believe in God, believe also in me.

John 17:3

And this is life eternal, that they should know thee the only true God, and him whom thou didst send, even Jesus Christ.

Acts 16:31

And they said, Believe on the Lord Jesus, and thou shalt be saved, thou and thy house.

Ephesians 5:2

and walk in love, even as Christ also loved you, and gave himself up for us, an offering and a sacrifice to God for an odor of a sweet smell.

1 Thessalonians 4:9

But concerning love of the brethren ye have no need that one write unto you: for ye yourselves are taught of God to love one another;

1 Timothy 1:15

Faithful is the saying, and worthy of all acceptation, that Christ Jesus came into the world to save sinners; of whom I am chief:

1 Peter 1:22

Seeing ye have purified your souls in your obedience to the truth unto unfeigned love of the brethren, love one another from the heart fervently:

1 Peter 4:8

above all things being fervent in your love among yourselves; for love covereth a multitude of sins:

1 John 2:8-10

Again, a new commandment write I unto you, which thing is true in him and in you; because the darkness is passing away, and the true light already shineth.

1 John 4:21

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

Treasury of Scripture Knowledge

Summary

And this is his commandment, That we should believe on the name of his Son Jesus Christ, and love one another, as he gave us commandment.

Bible References

His commandment

Deuteronomy 18:15
Jehovah thy God will raise up unto thee a prophet from the midst of thee, of thy brethren, like unto me; unto him ye shall hearken;
Psalm 2:12
Kiss the son, lest he be angry, and ye perish in the way, For his wrath will soon be kindled. Blessed are all they that take refuge in him.
Mark 9:7
And there came a cloud overshadowing them: and there came a voice out of the cloud, This is my beloved Son: hear ye him.
John 6:29
Jesus answered and said unto them, This is the work of God, that ye believe on him whom he hath sent.
John 14:1
Let not your heart be troubled: believe in God, believe also in me.
John 17:3
And this is life eternal, that they should know thee the only true God, and him whom thou didst send, even Jesus Christ.
Acts 16:31
And they said, Believe on the Lord Jesus, and thou shalt be saved, thou and thy house.
1 Timothy 1:15
Faithful is the saying, and worthy of all acceptation, that Christ Jesus came into the world to save sinners; of whom I am chief:

Love

1 John 3:11
For this is the message which ye heard from the beginning, that we should love one another:
1 John 2:8
Again, a new commandment write I unto you, which thing is true in him and in you; because the darkness is passing away, and the true light already shineth.
1 John 4:21
And this commandment have we from him, that he who loveth God love his brother also.
Matthew 22:39
And a second like unto it is this, Thou shalt love thy neighbor as thyself.
John 13:34
A new commandment I give unto you, that ye love one another; even as I have loved you, that ye also love one another.
John 15:12
This is my commandment, that ye love one another, even as I have loved you.
Ephesians 5:2
and walk in love, even as Christ also loved you, and gave himself up for us, an offering and a sacrifice to God for an odor of a sweet smell.
1 Thessalonians 4:9
But concerning love of the brethren ye have no need that one write unto you: for ye yourselves are taught of God to love one another;
1 Peter 1:22
Seeing ye have purified your souls in your obedience to the truth unto unfeigned love of the brethren, love one another from the heart fervently:
1 Peter 4:8
above all things being fervent in your love among yourselves; for love covereth a multitude of sins:

General references

Leviticus 19:37
And ye shall observe all my statutes, and all mine ordinances, and do them: I am Jehovah.
Deuteronomy 30:15
See, I have set before thee this day life and good, and death and evil;
Luke 11:28
But he said, Yea rather, blessed are they that hear the word of God, and keep it.
John 15:12
This is my commandment, that ye love one another, even as I have loved you.
Hebrews 13:1
Let love of the brethren continue.
1 John 4:11
Beloved, if God so loved us, we also ought to love one another.
1 John 5:2
Hereby we know that we love the children of God, when we love God and do his commandments.

American Standard Version Public Domain