Judges 13:21

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

Judges 6:22

Gideon saw that he was the angel of the LORD; and Gideon said, "Alas, Lord GOD. Because 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 won't eat of your bread. And if you prepare a burnt offering, you must offer it to the LORD." For Manoah did not know that he was the angel of the LORD.

Hosea 12:4-5

Indeed, he struggled with the angel, and prevailed; he wept, and made supplication to him. 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
Gideon saw that he was the angel of the LORD; and Gideon said, "Alas, Lord GOD. Because I have seen the angel of the LORD face to face."
Hosea 12:4
Indeed, he struggled with the angel, and prevailed; he wept, and made supplication to him. He found him at Bethel, and there he spoke with us,