Romans 14:8

For if we live, it is for the Lord's [honor]; or if we die, it is for the Lord's [honor]. So, whether we live or die, we belong to the Lord.

Philippians 1:20

It is my eager expectation and hope that I will not have to be ashamed about anything, but that I will have the courage, [both] now and always, [to so live] that Christ will be exalted [i.e., honored] in my body, whether I live or die.

1 Thessalonians 5:10

who died for us, so that whether we are awake or asleep [i.e., alive or dead], we could live together with Him.

Revelation 14:13

Then I heard a voice from heaven saying, "Write [this]: Those who are [now] dead, who died in [fellowship with] the Lord, are blessed from now on. Yes, says the Holy Spirit, they will rest from their work, for [the record of] their deeds will follow them [i.e., into the next life]."

John 21:19

Now Jesus said this to indicate the kind of death Peter would experience in honoring God. [Note: Some see the "stretching out your hands," verse 18, as a reference to crucifixion]. And after saying this, Jesus said to him, "Be my follower."

Acts 13:36

For David died and was buried with his forefathers and [his body] decayed after he had served his generation according to the purpose of God.

Acts 20:24

But I do not consider my life to be of value, as precious to me, [when compared to the importance of] accomplishing my task and the mission I received from the Lord Jesus to declare the good news of God's unearned favor [through Christ].

Acts 21:13

[But] Paul answered, "What are you trying to do [by your] crying and breaking my heart [like this]? [Do you not know that] I am ready, not only to be chained up, but also to die at Jerusalem for the name of the Lord Jesus?"

1 Corinthians 3:22-23

including Paul, and Apollos, and Cephas [i.e., Peter], and the world, and life and death, and present and future things. All of these things are yours. [Note: Paul is showing that, as Christians, they really possessed and should value all preachers and circumstances of life alike].

1 Corinthians 15:23

But each one [is raised up] in his own turn: Christ as the firstfruits [See verse 20]; then those who are Christ's [i.e., believers], when He returns.

Philippians 2:17

But even if I am poured out like a drink offering [See Ex. 29:38-41] on the sacrifice and service produced by your faith, I am glad and will rejoice with all of you. [Note: Paul here likens the possible pouring out of his blood to the wine and oil of the Old Testament sacrifice, which is then likened to the Philippians' faithful service to God].

Philippians 2:30

because he almost died for the work of Christ, risking his life to provide me with what you were not able to.

1 Thessalonians 4:14-18

For if we believe that Jesus died and rose again [from the dead], [we also believe] that God will bring [back to life], along with Jesus, those in [fellowship with] Him who have fallen asleep [in death].

Treasury of Scripture Knowledge

Summary

For whether we live, we live unto the Lord; and whether we die, we die unto the Lord: whether we live therefore, or die, we are the Lord's.

Bible References

We die unto

John 21:19
Now Jesus said this to indicate the kind of death Peter would experience in honoring God. [Note: Some see the "stretching out your hands," verse 18, as a reference to crucifixion]. And after saying this, Jesus said to him, "Be my follower."
Acts 13:36
For David died and was buried with his forefathers and [his body] decayed after he had served his generation according to the purpose of God.
Acts 20:24
But I do not consider my life to be of value, as precious to me, [when compared to the importance of] accomplishing my task and the mission I received from the Lord Jesus to declare the good news of God's unearned favor [through Christ].
Acts 21:13
[But] Paul answered, "What are you trying to do [by your] crying and breaking my heart [like this]? [Do you not know that] I am ready, not only to be chained up, but also to die at Jerusalem for the name of the Lord Jesus?"
Philippians 2:17
But even if I am poured out like a drink offering [See Ex. 29:38-41] on the sacrifice and service produced by your faith, I am glad and will rejoice with all of you. [Note: Paul here likens the possible pouring out of his blood to the wine and oil of the Old Testament sacrifice, which is then likened to the Philippians' faithful service to God].
1 Thessalonians 5:10
who died for us, so that whether we are awake or asleep [i.e., alive or dead], we could live together with Him.

We live therefore

1 Corinthians 3:22
including Paul, and Apollos, and Cephas [i.e., Peter], and the world, and life and death, and present and future things. All of these things are yours. [Note: Paul is showing that, as Christians, they really possessed and should value all preachers and circumstances of life alike].
1 Corinthians 15:23
But each one [is raised up] in his own turn: Christ as the firstfruits [See verse 20]; then those who are Christ's [i.e., believers], when He returns.
1 Thessalonians 4:14
For if we believe that Jesus died and rose again [from the dead], [we also believe] that God will bring [back to life], along with Jesus, those in [fellowship with] Him who have fallen asleep [in death].
Revelation 14:13
Then I heard a voice from heaven saying, "Write [this]: Those who are [now] dead, who died in [fellowship with] the Lord, are blessed from now on. Yes, says the Holy Spirit, they will rest from their work, for [the record of] their deeds will follow them [i.e., into the next life]."