Judges 13:20-22

20it happened as the flame went up toward heaven from the altar—the Angel of the Lord ascended in the flame of the altar! When Manoah and his wife saw this, they fell on their faces to the ground.

21When the Angel of the Lord appeared no more to Manoah and his wife, then Manoah knew that He was the Angel of the Lord.

22And Manoah said to his wife, “We shall surely die, because we have seen God!”