Judges 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.
Judges 6:22
When Gideon realized that it was the Lord's messenger, he said, "Oh no! Master, Lord! I have seen the Lord's messenger face to face!"
Judges 13:16
The Lord's messenger said to Manoah, "If I stay, I will not eat your food. But if you want to make a burnt sacrifice to the Lord, you should offer it." (He said this because Manoah did not know that he was the Lord's messenger.)
Hosea 12:4-5
He struggled with an angel and prevailed; he wept and begged for his favor. He found God at Bethel, and there he spoke with him!