John Gill Commentary Revelation 5:7

"And he came, and he taketh [it] out of the right hand of him that sat on the throne." — Revelation 5:7 (ASV)

And he came
He drew nigh to the throne of God, he engaged his heart to approach unto him, and came up even to his seat, which a mere creature, without a Mediator, cannot do:

and took the book out of the right hand of him that sat upon the
throne; (See Gill on Revelation 5:1); it being given unto him, as in (Revelation 1:1) ; and a commission and authority to open it, and make it manifest to others, and to accomplish the several events, in the several periods of time, it points unto.