Isaiah 6:1-6

1 In the year that king Uzziah died, I saw the Lord sitting on a throne, high and lifted up; and his train filled the temple.  2 Above him stood the seraphim. Each one had six wings. With two he covered his face. With two he covered his feet. With two he flew.  3 One called to another, and said,  "Holy, holy, holy, is Yahweh of Hosts!  The whole earth is full of his glory!"

4 The foundations of the thresholds shook at the voice of him who called, and the house was filled with smoke.  5 Then I said, "Woe is me! For I am undone, because I am a man of unclean lips, and I dwell in the midst of a people of unclean lips: for my eyes have seen the King, Yahweh of Hosts!"

6 Then one of the seraphim flew to me, having a live coal in his hand, which he had taken with the tongs from off the altar. 

Revelation 4:6-8

6 Before the throne was something like a sea of glass, similar to crystal. In the midst of the throne, and around the throne were four living creatures full of eyes before and behind.  7 The first creature was like a lion, and the second creature like a calf, and the third creature had a face like a man, and the fourth was like a flying eagle.  8 The four living creatures, each one of them having six wings, are full of eyes around about and within. They have no rest day and night, saying, "Holy, holy, holy, holy, holy, holy, holy, holy, holy is the Lord God, the Almighty, who was and who is and who is to come!"

Acts 7:55-56

55 But he, being full of the Holy Spirit, looked up steadfastly into heaven, and saw the glory of God, and Jesus standing on the right hand of God,  56 and said, "Behold, I see the heavens opened, and the Son of Man standing at the right hand of God!"