What will the 144,000 do during the Tribulation?
According to the context, the 144,000 will not limit their ministry to the nation of Israel. Instead, they will circumvent the globe, reaching all nations, kindreds, peoples, and tongues. They will serve as missionaries and evangelists, fulfilling the role for which God prepared Israel.
Les explains that the 144,000 will not limit their ministry to the nation of Israel; instead, they will circumvent the globe, reaching all nations, kindreds, people, and tongues. He uses the illustration of an athlete who redeems themselves from being the goat to being the hero. Les connects this to God's setting aside Israel to fulfill Genesis 3:15, the promise that the seed of the woman would be the Redeemer. God promised Abraham that through his covenant people the Messiah would come, and so He prepares Israel for the role of missionaries and evangelists.