John the Apostle
Revelation 10:7ESV·traditional attribution

but that in the days of the trumpet call to be sounded by the seventh angel, the mystery of God would be fulfilled, just as he announced to his servants the prophets.

Matthew Henry Presbyterian @wholebiblehenry

Here we have an account of another vision the apostle was favoured with, between the sounding of the sixth trumpet and that of the seventh. And we observe, I. The person who was principally concerned in communicating this discovery to John - an angel from heaven, another mighty angel, who is so set forth as would induce one to think it could be no other...

Commenting on Revelation 10:1-7

John Gill Reformed Baptist @doctorgill

But in the days of the voice of the seventh angel, when he shall begin to sound,.... This is an exception to what the angel had said and swore to, that time should be no longer; "but", or "unless", or "except the time of the voice of the seventh angel", as the Ethiopic version renders it; when a new period and sort of time should...

Albert Barnes Presbyterian @notesbybarnes

Verse 7. But in the days of the voice of the seventh angel. The days in the period of time embraced by the sounding of the seventh trumpet. That is, the affairs of this world would not be consummated in that period embraced in the sounding of the sixth trumpet, but in that embraced in the sounding of the seventh and last of the trumpets. Compare .