Judges 13:21

Now the angel of the Lord did not appear to Manoah or his wife again. Then Manoah knew that he was the angel of the Lord.

Judges 6:22

When Gideon saw that he was the angel of the Lord, he said, “Alas, O Lord God! For now I have seen the angel of the Lord face to face.”

Judges 13:16

The angel of the Lord said to Manoah, “Though you detain me, I will not eat your food, but if you prepare a burnt offering, then offer it to the Lord.” For Manoah did not know that he was the angel of the Lord.

Hosea 12:4-5

Yes, he wrestled with the angel and prevailed;
He wept and sought His favor.
He found Him at Bethel
And there He spoke with us,

Treasury of Scripture Knowledge

Summary

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.

Bible References

Knew

Judges 6:22
When Gideon saw that he was the angel of the Lord, he said, “Alas, O Lord God! For now I have seen the angel of the Lord face to face.”
Hosea 12:4
Yes, he wrestled with the angel and prevailed;
He wept and sought His favor.
He found Him at Bethel
And there He spoke with us,