1 John 3:23

And this is His commandment: We should believe in the name of His Son Jesus Christ [i.e., the person of Christ], and love one another, just He has commanded us to do.

John 6:29

Jesus answered them, "This is the deed that God requires: You should believe in Him whom God has sent [i.e., in Jesus]."

John 13:34

I am giving you a new commandment: love one another. Also you should love one another in the same way that I have loved you.

John 15:12

My commandment [to you] is this: You should love one another just as I have loved you.

1 John 3:11

[Now] this is the message that you people heard from the beginning [of Christ's ministry], that we should love one another [See Mark 12:31],

Matthew 22:39

A second one, similar to it is [Lev. 19:18], 'You must love your neighbor the same way that you love yourself.'

Mark 9:7

[Just then] a cloud engulfed them and a voice spoke out of the cloud saying, "This is my dearly loved Son, listen to Him."

John 14:1

[Jesus continued], "Do not allow your hearts to be upset. You should believe in God, and believe in me also.

John 17:3

And this is never ending life; that people may know you [as] the only true God, and Jesus Christ, the One whom you have sent.

Acts 16:31

Paul and Silas said, "You and your family can be saved if you [all] believe in the Lord Jesus."

Ephesians 5:2

Live in a loving way, just like Christ loved us and gave Himself up [to die] for us as an offering and fragrant smelling sacrifice to God.

1 Thessalonians 4:9

Now you people do not need anyone to write to you about loving [your] brothers, for you yourselves have been taught by God to love one another.

1 Timothy 1:15

This saying is trustworthy and deserves to be fully accepted: Christ Jesus came into the world to save sinners, and I am the worst of them all.

1 Peter 1:22

[Since] you have purified your souls by [your] obedience to the truth [i.e., the Gospel message], which produces a genuine love for your brothers, [now] you should have this kind of fervent, heartfelt love for one another.

1 Peter 4:8

Above everything else, have a warm love for one another, for such a love keeps many sins from occurring [between you].

1 John 2:8-10

Yet, I am [also] writing to you about a new commandment [Note: This commandment was to love one another as Jesus loved them. See John 13:34]; its truth is [being demonstrated] by Christ [perfectly] and [also] by you people [in a lesser measure], because the darkness [of sin] is passing away, and the real light [of righteousness] is already shining [in people's lives].

1 John 4:21

And this is the [greatest] commandment [See Matt. 2:37-38] we have received from Him: [It requires] that the person who [claims to] love God should also love his brother.

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

Mark 9:7
[Just then] a cloud engulfed them and a voice spoke out of the cloud saying, "This is my dearly loved Son, listen to Him."
John 6:29
Jesus answered them, "This is the deed that God requires: You should believe in Him whom God has sent [i.e., in Jesus]."
John 14:1
[Jesus continued], "Do not allow your hearts to be upset. You should believe in God, and believe in me also.
John 17:3
And this is never ending life; that people may know you [as] the only true God, and Jesus Christ, the One whom you have sent.
Acts 16:31
Paul and Silas said, "You and your family can be saved if you [all] believe in the Lord Jesus."
1 Timothy 1:15
This saying is trustworthy and deserves to be fully accepted: Christ Jesus came into the world to save sinners, and I am the worst of them all.

Love

1 John 3:11
[Now] this is the message that you people heard from the beginning [of Christ's ministry], that we should love one another [See Mark 12:31],
1 John 2:8
Yet, I am [also] writing to you about a new commandment [Note: This commandment was to love one another as Jesus loved them. See John 13:34]; its truth is [being demonstrated] by Christ [perfectly] and [also] by you people [in a lesser measure], because the darkness [of sin] is passing away, and the real light [of righteousness] is already shining [in people's lives].
1 John 4:21
And this is the [greatest] commandment [See Matt. 2:37-38] we have received from Him: [It requires] that the person who [claims to] love God should also love his brother.
Matthew 22:39
A second one, similar to it is [Lev. 19:18], 'You must love your neighbor the same way that you love yourself.'
John 13:34
I am giving you a new commandment: love one another. Also you should love one another in the same way that I have loved you.
John 15:12
My commandment [to you] is this: You should love one another just as I have loved you.
Ephesians 5:2
Live in a loving way, just like Christ loved us and gave Himself up [to die] for us as an offering and fragrant smelling sacrifice to God.
1 Thessalonians 4:9
Now you people do not need anyone to write to you about loving [your] brothers, for you yourselves have been taught by God to love one another.
1 Peter 1:22
[Since] you have purified your souls by [your] obedience to the truth [i.e., the Gospel message], which produces a genuine love for your brothers, [now] you should have this kind of fervent, heartfelt love for one another.
1 Peter 4:8
Above everything else, have a warm love for one another, for such a love keeps many sins from occurring [between you].

General references

Luke 11:28
But Jesus said, "Yes, but those who listen to God's message and obey it are [more] blessed."
John 15:12
My commandment [to you] is this: You should love one another just as I have loved you.
Hebrews 13:1
Continue to love [one another] as brothers.
1 John 4:11
Loved ones, if God loved us that much, we should also love one another.
1 John 5:2
This is [one] way we know that we love God's [spiritually reborn] children: [It is] when we love God and obey what He commands us to do.