That it is thou, to wit, an angel or messenger sent from God, that appears to me, and discourseth with me; and not a fancy or delusion; that thou art in truth what thou seemest and pretendest to be, Judges 7:12. Or, a sign of that which thou talkest with me, i.e. that thou wilt by me smite the Midianites.
Related Commentaries of Judges 6:17
Judges 6:17
17 And he said unto him, If now I have found grace in thy sight, then shew me a sign that thou talkest with me.