Revelation 4:1-3

Young's Literal Translation

4 After these things I saw, and lo, a door opened in the heaven, and the first voice that I heard [is] as of a trumpet speaking with me, saying, `Come up hither, and I will shew thee what it behoveth to come to pass after these things;'

² and immediately I was in the Spirit, and lo, a throne was set in the heaven, and upon the throne is [one] sitting,

³ and He who is sitting was in sight like a stone, jasper and sardine: and a rainbow was round the throne in sight like an emerald.