John the Apostle
Revelation 2:25BSB·traditional attribution

than to hold fast to what you have until I come.

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

But that which ye have already,.... Which was something good, even the faithful word, the form of sound words, the mystery and doctrine of faith; this they had received from Christ and his apostles; they had it in their hearts, and a comfortable experience of the truth and power of it, and had made a profession of it, which they now held, and are here...

Albert Barnes Presbyterian @notesbybarnes

Verse 25. But that which ye have, etc. All that there is of truth and purity remaining among you, retain faithfully. See . Till I come. To receive you to myself, . (f) "that which"