Judges 13:19-21
So Manoah took a kid with a meat offering, and
offered it upon a rock unto the LORD: and the angel did wonderously; and
Manoah and his wife looked on.
For it came to pass, when the flame
went up toward heaven from off the altar, that the angel of the LORD
ascended in the flame of the altar. And Manoah and his wife looked on
it, and fell on their faces to the ground.
But the angel of the LORD did no more appear to Manoah and to his wife. Then Manoah knew that he was an angel of the LORD.