There are a number of significant contrasts between the144 ,000 and this great multitude that argue for two different groups even though some scholars have considered the two groups as one viewed from different perspectives. [1] The number of the first group is not only smaller but definite whereas the number of the second group is larger and indefinite. People from the12tribes of Israel make up the first group, but people from every nation, tribe, people, and tongue compose the second. God prepares the first group for imminent peril on the earth, but the second group is victorious, secure, and at rest in heaven. [source][source][source]
"This group, like the144 ,000 , is unhurt by the effects of God"s wrath, but for a different reason. They have at this point been removed from the earthly scene of the wrath and have no need of protective sealing. Someone might ask, "Are the144 ,000 the only ones who have maintained their composure under the first six seals?" This vision responds to such a question negatively. A vast throng has turned to God during this period and have now passed into His immediate presence through death [2]." [3][source]
This pericope describes events transpiring in heaven. [source][source][source]
"Without doubt it is one of the most exalted portrayals of the heavenly state to be found anywhere in Scripture." [4][source]