Alas, O Lord GOD! - Compare Joshua 7:7. “because I have seen an angel of the Lord” Compare the marginal references, in which the notion that it was death for mortal man to see God appears clearly. The same notion prevailed among the pagan.
Related Commentaries of Judges 6:22
Judges 6:22
22 And when Gideon perceived that he was an angel of the LORD, Gideon said, Alas, O Lord GOD! for because I have seen an angel of the LORD face to face.