Where does it say that anywhere in the text about the activities of the one hundred and forty four thousand?
Revelation 7 (King James Version)
Revelation 7
1And after these things I saw four angels standing on the four corners of the earth, holding the four winds of the earth, that the wind should not blow on the earth, nor on the sea, nor on any tree.
2And I saw another angel ascending from the east, having the seal of the living God: and he cried with a loud voice to the four angels, to whom it was given to hurt the earth and the sea,
3Saying, Hurt not the earth, neither the sea, nor the trees, till we have sealed the servants of our God in their foreheads.
4And 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.
5Of 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.
6Of the tribe of Aser were sealed twelve thousand. Of the tribe of Nephthalim were sealed twelve thousand. Of the tribe of Manasses were sealed twelve thousand.
7Of the tribe of Simeon were sealed twelve thousand. Of the tribe of Levi were sealed twelve thousand. Of the tribe of Issachar were sealed twelve thousand.
8Of 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.
9After this I beheld, and, lo, a great multitude, which no man could number, of all nations, and kindreds, and people, and tongues, stood before the throne, and before the Lamb, clothed with white robes, and palms in their hands;
10And cried with a loud voice, saying, Salvation to our God which sitteth upon the throne, and unto the Lamb.
11And all the angels stood round about the throne, and about the elders and the four beasts, and fell before the throne on their faces, and worshipped God,
12Saying, Amen: Blessing, and glory, and wisdom, and thanksgiving, and honour, and power, and might, be unto our God for ever and ever. Amen.
13And one of the elders answered, saying unto me, What are these which are arrayed in white robes? and whence came they?
14And I said unto him, Sir, thou knowest. 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.
15Therefore are they before the throne of God, and serve him day and night in his temple: and he that sitteth on the throne shall dwell among them.
16They shall hunger no more, neither thirst any more; neither shall the sun light on them, nor any heat.
17For 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.
Here are some verses to chew on:
Revelation 7:3-5 (New King James Version) 3 saying, “Do not harm the earth, the sea, or the trees till we have sealed the servants of our God on their foreheads.” 4 And I heard the number of those who were sealed. One hundred and forty-four thousand of all the tribes of the children of Israel were sealed:
Revelation 7:17 (New King James Version) 17 for the Lamb who is in the midst of the throne will shepherd them and lead them to living fountains of waters.[a] And God will wipe away every tear from their eyes.”
Revelation 14:1-5 (New King James Version) Revelation 14 The Lamb and the 144,000 1 Then I looked, and behold, a[a] Lamb standing on Mount Zion, and with Him one hundred and forty-four thousand, having[b] His Father’s name written on their foreheads. 2 And I heard a voice from heaven, like the voice of many waters, and like the voice of loud thunder. And I heard the sound of harpists playing their harps. 3 They sang as it were a new song before the throne, before the four living creatures, and the elders; and no one could learn that song except the hundred and forty-four thousand who were redeemed from the earth. 4 These are the ones who were not defiled with women, for they are virgins. These are the ones who follow the Lamb wherever He goes. These were redeemed[c] from among men, being firstfruits to God and to the Lamb. 5 And in their mouth was found no deceit,[d] for they are without fault before the throne of God.[e]
Revelation 17:14 (New King James Version) 14 These will make war with the Lamb, and the Lamb will overcome them, for He is Lord of lords and King of kings; and those who are with Him are called, chosen, and faithful.”
In the New Jerusalem also:
Revelation 21:12 (New King James Version) 12 Also she had a great and high wall with twelve gates, and twelve angels at the gates, and names written on them, which are the names of the twelve tribes of the children of Israel: