Albert Barnes Commentary Judges 13:6

"Then the woman came and told her husband, saying, A man of God came unto me, and his countenance was like the countenance of the angel of God, very terrible; and I asked him not whence he was, neither told he me his name:" — Judges 13:6 (ASV)

A man of God - The designation of a prophet, of frequent use in the books of Samuel and Kings (1 Samuel 2:27; 1 Samuel 9:6–8, 10; 1 Kings 12:22; 1 Kings 13:1, 5-6, 11), and applied to Timothy by Paul in the New Testament (1 Timothy 6:11; 2 Timothy 3:17).

His countenance - Rather, “his appearance,” as the word is rendered in Daniel 10:18.