Would you be referring to Rev 7:
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1 After this I saw four angels standing at the four corners of the earth, 2 holding back the four winds of the earth so that no wind could blow on land or sea or against any tree.
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Then I saw another angel come up from the East, 3 holding the seal of the living God. He cried out in a loud voice to the four angels who were given power to damage the land and the sea,
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“Do not damage the land or the sea or the trees until we put the seal on the foreheads of the servants of our God.”
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I heard the number of those who had been marked with the seal, one hundred and forty-four thousand marked 4 from every tribe of the Israelites:
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twelve thousand were marked from the tribe of Judah, 5 twelve thousand from the tribe of Reuben, twelve thousand from the tribe of Gad,
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twelve thousand from the tribe of Asher, twelve thousand from the tribe of Naphtali, twelve thousand from the tribe of Manasseh,
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twelve thousand from the tribe of Simeon, twelve thousand from the tribe of Levi, twelve thousand from the tribe of Issachar,
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twelve thousand from the tribe of Zebulun, twelve thousand from the tribe of Joseph, and twelve thousand were marked from the tribe of Benjamin.
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After this I had a vision of a great multitude, which no one could count, from every nation, race, people, and tongue. They stood before the throne and before the Lamb, wearing white robes and holding palm branches 6 in their hands.
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They cried out in a loud voice: “Salvation comes from 7 our God, who is seated on the throne, and from the Lamb.”
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All the angels stood around the throne and around the elders and the four living creatures. They prostrated themselves before the throne, worshiped God,
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and exclaimed: “Amen. Blessing and glory, wisdom and thanksgiving, honor, power, and might be to our God forever and ever. Amen.”
I think that it does not make a distinction between the 144,000 Jews and the multitudes without number inasmuch as they have had the seal applied. I think that the key here is - great multitude that no one could count from every nation, race, people and tongue. The vast majority of people upon the Earth.
Is this where you wished me to go?
The point was that there's no changing the number of the elect, and that God knew them from before Creation.
It's as fixed by His foreknowledge as it would be by His foredecision.