Revelation 6:9

When He (the Lamb) broke open the fifth seal, I saw underneath the altar the souls of those who had been slaughtered because of the word of God, and because of the testimony which they had maintained [out of loyalty to Christ].

Revelation 14:18

And another angel came from the altar, the one who has power over fire; and he called with a loud voice to him who had the sharp sickle, saying, “Put in your sharp sickle and reap the clusters of grapes from the vine of the earth, because her grapes are ripe [for judgment].”

Revelation 20:4

And then I saw thrones, and sitting on them were those to whom judgment [that is, the authority to act as judges] was given. And I saw the souls of those who had been beheaded because of their testimony of Jesus and because of the word of God, and those who had refused to worship the beast or his image, and had not accepted his mark on their forehead and on their hand; and they came to life and reigned with Christ for a thousand years.

Revelation 1:9

I, John, your brother and companion in the tribulation and kingdom and patient endurance which are in Jesus, was on the island called Patmos, [exiled there] because of [my preaching of] the word of God [regarding eternal salvation] and the testimony of Jesus Christ.

Leviticus 4:7

The priest shall also put some of the blood on the horns of the altar of fragrant incense which is before the Lord in the Tent of Meeting. All the rest of the blood of the bull he shall pour out at the base of the altar of the burnt offering which is at the doorway of the Tent of Meeting.

John 16:2

They will put you out of the synagogues and make you outcasts. And a time is coming when whoever kills you will think that he is offering service to God.

Revelation 16:7

And I heard [another from] the altar saying, “Yes, O Lord God, the Almighty [the Omnipotent, the Ruler of all], Your judgments are true and fair and righteous.”

2 Corinthians 5:8

we are [as I was saying] of good courage and confident hope, and prefer rather to be absent from the body and to be at home with the Lord.

Philippians 1:23

But I am hard-pressed between the two. I have the desire to leave [this world] and be with Christ, for that is far, far better;

Philippians 2:17

But even if I am being poured out as a drink offering on the sacrifice and service of your faith [for preaching the message of salvation], still I rejoice and share my joy with you all.

2 Timothy 1:8

So do not be ashamed to testify about our Lord or about me His prisoner, but with me take your share of suffering for the gospel [continue to preach regardless of the circumstances], in accordance with the power of God [for His power is invincible],

2 Timothy 4:6

For I am already being poured out as a drink offering, and the time of my departure [from this world] is at hand and I will soon go free.

Revelation 1:2

who testified and gave supporting evidence to the word of God and to the testimony of Jesus Christ, even to everything that he saw [in his visions].

Revelation 2:13

‘I know where you dwell, [a place] where Satan sits enthroned. Yet you are holding fast to My name, and you did not deny My faith even in the days of Antipas, My witness, My faithful one, who was killed (martyred) among you, where Satan dwells.

Revelation 8:3

Another angel came and stood at the altar. He had a golden censer, and much incense was given to him, so that he might add it to the prayers of all the saints (God’s people) on the golden altar in front of the throne.

Revelation 9:13

Then the sixth angel sounded [his trumpet], and I heard a solitary voice from the four horns of the golden altar which stands before God,

Revelation 11:3-7

And I will grant authority to My two witnesses, and they will prophesy for twelve hundred and sixty days (forty-two months; three and one-half years), dressed in sackcloth.”

Revelation 12:11-17

And they overcame and conquered him because of the blood of the Lamb and because of the word of their testimony, for they did not love their life and renounce their faith even when faced with death.

Revelation 19:10

Then I fell down at his feet to worship him, but he [stopped me and] said to me, “You must not do that; I am a fellow servant with you and your brothers and sisters who have and hold the testimony of Jesus. Worship God [alone]. For the testimony of Jesus is the spirit of prophecy [His life and teaching are the heart of prophecy].”

Treasury of Scripture Knowledge

Summary

And when he had opened the fifth seal, I saw under the altar the souls of them that were slain for the word of God, and for the testimony which they held:

General references

Bible References

I saw

Revelation 8:3
Another angel came and stood at the altar. He had a golden censer, and much incense was given to him, so that he might add it to the prayers of all the saints (God’s people) on the golden altar in front of the throne.
Revelation 9:13
Then the sixth angel sounded [his trumpet], and I heard a solitary voice from the four horns of the golden altar which stands before God,
Revelation 14:18
And another angel came from the altar, the one who has power over fire; and he called with a loud voice to him who had the sharp sickle, saying, “Put in your sharp sickle and reap the clusters of grapes from the vine of the earth, because her grapes are ripe [for judgment].”
Leviticus 4:7
The priest shall also put some of the blood on the horns of the altar of fragrant incense which is before the Lord in the Tent of Meeting. All the rest of the blood of the bull he shall pour out at the base of the altar of the burnt offering which is at the doorway of the Tent of Meeting.
John 16:2
They will put you out of the synagogues and make you outcasts. And a time is coming when whoever kills you will think that he is offering service to God.
2 Timothy 4:6
For I am already being poured out as a drink offering, and the time of my departure [from this world] is at hand and I will soon go free.

The souls

Revelation 20:4
And then I saw thrones, and sitting on them were those to whom judgment [that is, the authority to act as judges] was given. And I saw the souls of those who had been beheaded because of their testimony of Jesus and because of the word of God, and those who had refused to worship the beast or his image, and had not accepted his mark on their forehead and on their hand; and they came to life and reigned with Christ for a thousand years.
2 Corinthians 5:8
we are [as I was saying] of good courage and confident hope, and prefer rather to be absent from the body and to be at home with the Lord.
Philippians 1:23
But I am hard-pressed between the two. I have the desire to leave [this world] and be with Christ, for that is far, far better;

Slain

Revelation 1:9
I, John, your brother and companion in the tribulation and kingdom and patient endurance which are in Jesus, was on the island called Patmos, [exiled there] because of [my preaching of] the word of God [regarding eternal salvation] and the testimony of Jesus Christ.
Revelation 2:13
‘I know where you dwell, [a place] where Satan sits enthroned. Yet you are holding fast to My name, and you did not deny My faith even in the days of Antipas, My witness, My faithful one, who was killed (martyred) among you, where Satan dwells.
Revelation 11:3
And I will grant authority to My two witnesses, and they will prophesy for twelve hundred and sixty days (forty-two months; three and one-half years), dressed in sackcloth.”
Revelation 12:11
And they overcame and conquered him because of the blood of the Lamb and because of the word of their testimony, for they did not love their life and renounce their faith even when faced with death.
Revelation 19:10
Then I fell down at his feet to worship him, but he [stopped me and] said to me, “You must not do that; I am a fellow servant with you and your brothers and sisters who have and hold the testimony of Jesus. Worship God [alone]. For the testimony of Jesus is the spirit of prophecy [His life and teaching are the heart of prophecy].”
2 Timothy 1:8
So do not be ashamed to testify about our Lord or about me His prisoner, but with me take your share of suffering for the gospel [continue to preach regardless of the circumstances], in accordance with the power of God [for His power is invincible],

General references

Matthew 21:35
But the tenants took his servants and beat one, and killed another, and stoned a third.
Hebrews 12:4
You have not yet struggled to the point of shedding blood in your striving against sin;