7:3 - Saying, Hurt not the earth, neither the sea, nor the trees, till we have sealed the servants of our God in their foreheads.

Cyprian Treatise V An Address to Demetrianus
As, then, when Egypt was smitten, the Jewish people could not escape except by the blood and the sign of the lamb; so also, when the world shall begin to be desolated and smitten, whoever is found in the blood and the sign of Christ alone shall escape.[40]

7:4 - And I heard the number of them which were sealed: and there were sealed an hundred and forty and four thousand of all the tribes of the children of Israel.

Shepherd of Hermas Similitude Ninth
"Now, sir," I continued, "explain to me, with respect to the mountains, why their forms are various and diverse." "Listen," he said: "these mountains are the twelve tribes, which inhabit the whole world.[29]
Methodius Discourse VI. Agathe
and I join with their company in the new song of the archangels, showing forth the new grace of the Church; for the Word says that the company of virgins always follow the Lord, and have fellowship with Him wherever He is. And this is what John signifies in the commemoration of the hundred and forty-four thousand.[20]

7:5 - Of the tribe of Juda were sealed twelve thousand. Of the tribe of Reuben were sealed twelve thousand. Of the tribe of Gad were sealed twelve thousand.

Irenaeus Against Heresies Book V
This, too, is the reason that this tribe is not reckoned in the Apocalypse along with those which are saved.[257]

7:8 - Of the tribe of Zabulon were sealed twelve thousand. Of the tribe of Joseph were sealed twelve thousand. Of the tribe of Benjamin were sealed twelve thousand.

The Testaments of the Twelve Patriarchs XII
For our father loved Rachel dearly, and prayed that he might see two sons born from her: therefore was I called the son of days, which is Benjamin.[1]

7:9 - After this I beheld, and, lo, a great multitude, which no man could number, of all nations, and families, and people, and tongues, stood before the throne, and before the Lamb, clothed with white robes, and palms in their hands;

Cyprian Treatise XI Exhortation to Martyrdom Addressed to Fortunatus
And he said unto me, These are they who have come out of great tribulation, and have washed their robes, and made them white in the blood of the Lamb. Therefore are they before the throne of God, and serve Him day and night in His temple."[106]
Cyprian Treatise XII Three Books of Testimonies Against the Jews
They shall neither hunger nor thirst ever; and neither shall the sun fall upon them, nor shall they suffer any heat: for the Lamb who is in the midst of the throne shall protect them, and shall lead them to the fountains of the waters of life; and God shall wipe away every tear from their eyes."[488]
Methodius Discourse I. Marcella
"I beheld a great multitude, which no man could number, of all nations, and kindreds, and people, and tongues."[23]

7:14 - And I said unto him, Sir, you know. And he said to me, These are they which came out of great tribulation, and have washed their robes, and made them white in the blood of the Lamb.

Tertullian Scorpiace
For yet again a countless throng are revealed, clothed in white and distinguished by palms of victory, celebrating their triumph doubtless over Antichrist, since one of the elders says, "These are they who come out of that great tribulation, and have washed their robes, and made them white in the blood of the Lamb."[88]
Cyprian Treatise XI Exhortation to Martyrdom Addressed to Fortunatus
For if I were to give a man a garment finished and ready, it would be my garment that another was making use of, and probably the thing made for another would be found little fitting for his figure of stature and body. But now I have sent you the very wool and the purple[7]

7:17 - For the Lamb which is in the midst of the throne shall feed them, and shall lead them unto living fountains of waters: and God shall wipe away all tears from their eyes.

Tertullian On the Resurrection of the Flesh
The angel echoes the same to John: "And God shall wipe away all tears from their eyes; "[447]
Revelation of Saint John the Theologian
After that there is no pain, there is no grief, there is no groaning; there is no recollection of evils, there are no tears, there is no envy, there is no hatred of brethren, there is no unrighteousness, there is no arrogance, there is no slander, there is no bitterness, there are none of the cares of life, there is no pain from parents or children, there is no pain from gold, there are no wicked thoughts, there is no devil, there is no death, there is no night, but all is day.[52]