John the Apostle
Revelation 11:13ESV·traditional attribution

And at that hour there was a great earthquake, and a tenth of the city fell. Seven thousand people were killed in the earthquake, and the rest were terrified and gave glory to the God of heaven.

Matthew Henry Presbyterian @wholebiblehenry

In this time of treading down, God has reserved to himself his faithful witnesses, who will not fail to attest the truth of his word and worship, and the excellency of his ways. Here observe, I. The number of these witnesses: it is but a small number and yet it is sufficient. 1. It is but small.

Commenting on Revelation 11:3-13

John Gill Reformed Baptist @doctorgill

And the same hour was there a great earthquake,.... Or the same day, as the Complutensian edition, and some copies, read; that is, at the time of the resurrection and ascension of the witnesses, as there was at the resurrection of Christ; and is to be understood of a very great commotion in the civil affairs of kingdoms and nations within the Roman jurisdiction, as...

Albert Barnes Presbyterian @notesbybarnes

Verse 13. And the same hour. In immediate connexion with their triumph. Was there a great earthquake. An earthquake is a symbol of commotion, agitation, change; of great political revolutions, etc. . The meaning here is, that the triumph of the witnesses, represented by their ascending to heaven, would be followed by such revolutions as would be properly symbolized by an earthquake. And the tenth part of the city fell.