John the Apostle
Revelation 2:23ESV·traditional attribution

and I will strike her children dead. And all the churches will know that I am he who searches mind and heart, and I will give to each of you according to your works.

Matthew Henry Presbyterian @wholebiblehenry

The form of each epistle is very much the same; and in this, as the rest, we have to consider the inscription, contents, and conclusion. I. The inscription, telling us, 1. To whom it is directed: To the angel of the church of Thyatira, a city of the proconsular Asia, bordering upon Mysia on the north and Lydia on the south, a town of trade...

Commenting on Revelation 2:18-29

John Gill Reformed Baptist @doctorgill

And I will kill her children with death,.... Her popes, cardinals, priests, Jesuits, monks, friars, and all that join in the Romish apostasy, they shall be killed with death; there shall be an utter extirpation of them in God's own time; or they shall be killed with the second death: when used alone, or as distinct from any other kind of death, signifies the plague...

Albert Barnes Presbyterian @notesbybarnes

Verse 23. And I will kill her children with death. A strong Hebraistic mode of expression, meaning that he would certainly destroy It them. has been made a question whether the word children here is to be taken literally or figuratively. The word itself would admit of either interpretation; and there is nothing in the connexion by which its meaning here can be determined.