When Jesus Christ reaps, after the tribulation when there are no longer any Believers alive on earth
(Matt 24:29), He is gathering all of the souls of all
saints of all time who are not already in the Temple of God.
The apostle Paul, writing to the church of Corinth and Thessalonica, provides additional
information of this reaping but with a view towards Believers
(1 Cor 15:51-54; 1 Thess 4:16-18).
Since the resurrection of Believers occurs later
(Rev 20:4), "the perishable must clothe itself with the
imperishable" refers to the white robes of righteousness, which the martyrs received earlier
(Rev 6:11) in preparation of the Wedding Feast
(Rev 19:7-8) and determines who is imperishable and
When the angel reaps, the "grapes" are tossed into the great wine press of the wrath of God
(Rev 19:17-20), and it is Jesus Christ, when He arrives at
Armageddon, who treads on the "grapes" in this wine press (Rev 19:15).
Taken into consideration, this reaping includes the dispensation of the bowl judgments and the battle of Armageddon.
For deeper study:
What and When is the Tribulation?