Ezekiel 1:28 (New International Version)
28 Like the appearance of a rainbow in the clouds on a rainy day, so was the radiance around him.
This was the appearance of the likeness of the glory of the LORD. When I saw it, I fell facedown, and I heard the voice of one speaking.
Revelation 10
The Angel and the Little Scroll
1Then I saw another mighty angel coming down from heaven. He was robed in a cloud, with a rainbow above his head; his face was like the sun, and his legs were like fiery pillars.