Revelation 4:1-3 NIV

[1] After this I looked, and there before me was a door standing open in heaven. And the voice I had first heard speaking to me like a trumpet said, “Come up here, and I will show you what must take place after this.” [2] At once I was in the Spirit, and there before me was a throne in heaven with someone sitting on it. [3] And the one who sat there had the appearance of jasper and ruby. A rainbow that shone like an emerald encircled the throne.