Judges 13:21

and the messenger of Jehovah hath not added again to appear unto Manoah, and unto his wife, then hath Manoah known that He is a messenger of Jehovah.

Judges 6:22

And Gideon seeth that He is a messenger of Jehovah, and Gideon saith, 'Alas, Lord Jehovah! because that I have seen a messenger of Jehovah face to face!'

Judges 13:16

And the messenger of Jehovah saith unto Manoah, 'If thou detain me -- I do not eat of thy bread; and if thou prepare a burnt-offering -- to Jehovah thou dost offer it;' for Manoah hath not known that He is a messenger of Jehovah.

Hosea 12:4-5

Yea, he is a prince unto the Messenger, And he overcometh by weeping, And he maketh supplication to Him, At Bethel He doth find him, And there He doth speak 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
And Gideon seeth that He is a messenger of Jehovah, and Gideon saith, 'Alas, Lord Jehovah! because that I have seen a messenger of Jehovah face to face!'
Hosea 12:4
Yea, he is a prince unto the Messenger, And he overcometh by weeping, And he maketh supplication to Him, At Bethel He doth find him, And there He doth speak with us,