1 Corinthians 15:20: “But now is Christ risen from the dead, and become the firstfruits of them that slept." Those that died in Christ.

1 Corinthians 15:23: “But every man in his own order: Christ the firstfruits; afterward they that are Christ's at his coming.”

Revelation 14:1: “And I” [John] “looked,” [a vision] “and, lo, a Lamb” [Christ] “stood on the mount Sion, and with him an hundred forty and four thousand, having his Father's name written in their foreheads.”

Revelation 14:4: “These are they” [The 144,000] “which were not defiled with women; for they are virgins. These are they which follow the Lamb” [Christ] “whithersoever he goeth. These were redeemed from among men, being the firstfruits: unto God and to the Lamb.”

Revelation 14:5: “And in their mouth was found no guile: for they are without fault before the throne of God.”