Judges 13:21

The angel of Yahweh did not appear again to Manoah and his wife, and then Manoah knew that he [was] a messenger of Yahweh.

Judges 6:22

And Gideon realized that he [was] the angel of Yahweh; and Gideon said, "Oh, my lord Yahweh! For now I have seen the angel of Yahweh face to face."

Judges 13:16

The angel of Yahweh said to Manoah, "If you keep me, I will not eat your food, but if you prepare a burnt offering for Yahweh, you can offer it (for Manoah did not know that he [was] an angel of Yahweh)."

Hosea 12:4-5

He struggled with [the] angel and prevailed; he pleaded for his mercy. He met him at Bethel, and there he spoke with him.

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
And Gideon realized that he [was] the angel of Yahweh; and Gideon said, "Oh, my lord Yahweh! For now I have seen the angel of Yahweh face to face."
Hosea 12:4
He struggled with [the] angel and prevailed; he pleaded for his mercy. He met him at Bethel, and there he spoke with him.