"I have come down from heaven--not to do my will, but to do the will of him who sent me. And this is the will of him who sent me, that I shall lose none of all that he has given me, but raise them up at the last day." John 6:38-39
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Raised them UP from WHAT?
Raise the body. Remember in Revelation where the souls who came out of the tribulation are in heaven crying for revenge on those who killed them? Their bodies have not been raised yet.
“Therefore they are before the throne of God, and serve Him day and night in His temple. And He who sits on the throne will dwell among them. They shall neither hunger anymore nor thirst anymore; the sun shall not strike them, nor any heat; for the Lamb who is in the midst of the throne will shepherd them and lead them to living fountains of waters. And God will wipe away every tear from their eyes” (Revelation 7:15-17 NKJV).
Those are the saints who have come to know the Lord during the tribulation and have lost their lives for their beliefs. Their bodies will be raised and glorified after Jesus comes at the end of the tribulation.