This gathering work does not refer to the initial ingathering of anointed ones; nor does it refer to the final sealing of the remaining anointed ones. That sealing happens before the outbreak of the great tribulation.
(‏ مت ١٣ :‏ ​ ٣٧ ،‏ ٣٨‏ )‏ فَهُمْ يُخْتَمُونَ ٱلْخَتْمَ ٱلنِّهَائِيَّ قَبْلَ ٱنْدِلَاعِ ٱلضِّيقِ ٱلْعَظِيمِ .‏