Matthew Poole and continuators on Revelation 1:2

2 Who bare record of the word of God , and of the testimony of Jesus Christ , and of all things that he saw .

This Phrase determines the Controversie about the Pen-man of this part of holy Writ, and puts it out of doubt, that it was Iohn the Apostle and Evangelist. The Phrase so agrees to Iohn 1.19, 32, 34. and 19.35. The word in the Greek signifies, bare Testimony to, or of the Word of God. Some understand Christ so called, 1 Iohn 1.2. Some would have the Gospel meant by it; and if any think this the more probable Sense, because, tho Christ be elsewhere called the Word, yet he is not called the Word of God; and it is not here in the Dative, but the Accusative Case; I see no reason to contradict them.

By the Testimony of Christ, is to be understood the Doctrine of Christ, called so, because it is a Testimony concerning him: Or rather, that which he testified, who is elsewhere called the true and faithful Witness.

This may be understood with reference to what went before; so it agreeth with 1 Iohn 1. or to what followeth in this Revelation, made to him in Visions, in a great measure.