Revelation 4:1-3

After these things I saw, and behold, a door opened in heaven, and the first voice that I heard, a voice as of a trumpet speaking with me, one saying, Come up hither, and I will show thee the things which must come to pass hereafter. Straightway I was in the Spirit: and behold, there was a throne set in heaven, and one sitting upon the throne; and he that sat was to look upon like a jasper stone and a sardius: and there was a rainbow round about the throne, like an emerald to look upon.