Judges 6:21

6:21 The Lord’s messenger touched the meat and the unleavened bread with the tip of his staff. Fire flared up from the rock and consumed the meat and unleavened bread. The Lord’s messenger then disappeared.

Judges 13:21

13:21 The Lord’s messenger did not appear again to Manoah and his wife. After all this happened Manoah realized that the visitor had been the Lord’s messenger.