A sign - If the Angel ate of Gideon's present it would be a conclusive proof of the reality of the vision. (Compare John 21:9-13; Luke 24:37-43; Acts 10:41.) It would also be a token of God's goodwill to Gideon. Compare Genesis 18:3.

Show me a sign - Work a miracle, that I may know that thou hast wisdom and power sufficient to authorize and quality me for the work.

And he said unto him, if now I have found grace in thy sight, &c. Or seeing he had, as appeared by his salutation of him as a man of might, by the work he gave him a commission to do, and by the promise of assistance and success:

then show me a sign that thou talkest with me; in the name of God, as a messenger sent by him, whether an angel or a man; for who he was as yet Gideon was not clear in it, and that what he had said was truth, and would be certainly fulfilled; and which Gideon might desire, not so much, or at least not only for his own sake, and the confirmation of his faith, for which he is renowned, as that he might be able to satisfy others that he had a commission from God, by a messenger of his, to attempt the deliverance of Israel.

As Gideon could no longer have any doubt after this promise that the person who had appeared to him was speaking in the name of God, he entreated him to assure him by a sign (אות, a miraculous sign) of the certainty of his appearance. "Do a sign that thou art speaking with me," i.e., that thou art really God, as thou affirmest. שׁאתּה, or אתּה אשׁר, is taken from the language of ordinary life. At the same time he presents this request: "Depart not hence till I((go and) come to thee, and bring out my offering and set it before thee;" and the angel at once assents. Minchah does not mean a sacrifice in the strict sense (θυσία, sacrificium), nor merely a "gift of food," but a sacrificial gift in the sense of a gift presented to God, on the acceptance of which he hoped to receive the sign, which would show whether the person who had appeared to him was really God. This sacrificial gift consisted of such food as they were accustomed to set before a guest whom they wished especially to honour. Gideon prepared a kid of the goats (עשׂה is used to denote the preparation of food, as in Genesis 18:7-8, etc.), and unleavened cakes of an ephah (about 221/2 lbs.) of meal, and brought the flesh in a basket and the broth in a pot out to the terebinth tree, and placed it before him.

And he said unto him, If now I have found grace in thy sight, then shew me {g} a sign that thou talkest with me.

(g) So that we see how the flesh is the enemy of God's calling, which cannot be persuaded without signs.

6:17 That thou - That it is thou, an angel or messenger sent from God, that appears to me, and discourseth with me. Or, a sign of that which thou talkest with me; that is, that thou wilt by me smite the Midianites.

Jud 6:17-32. Gideon's Present Consumed by Fire.

6:11-24 Gideon was a man of a brave, active spirit, yet in obscurity through the times: he is here stirred up to undertake something great. It was very sure that the Lord was with him, when his Angel was with him. Gideon was weak in faith, which made it hard to reconcile the assurances of the presence of God with the distress to which Israel was brought. The Angel answered his objections. He told him to appear and act as Israel's deliverer, there needed no more. Bishop Hall says, While God calls Gideon valiant, he makes him so. God delights to advance the humble. Gideon desires to have his faith confirmed. Now, under the influences of the Spirit, we are not to expect signs before our eyes such as Gideon here desired, but must earnestly pray to God, that if we have found grace in his sight, he would show us a sign in our heart, by the powerful working of his Spirit there, The Angel turned the meat into an offering made by fire; showing that he was not a man who needed meat, but the Son of God, who was to be served and honoured by sacrifice, and who in the fulness of time was to make himself a sacrifice. Hereby a sign was given to Gideon, that he had found grace in God's sight. Ever since man has by sin exposed himself to God's wrath and curse, a message from heaven has been a terror to him, as he scarcely dares to expect good tidings thence. In this world, it is very awful to have any converse with that world of spirits to which we are so much strangers. Gideon's courage failed him. But God spoke peace to him.