A token unto thee - Or the sign. The word means a declaration or promise of God, which rests absolutely on His word, and demands faith. The promise that God would have the people serve Him in that place was an assurance, if fully believed, that all intervening obstacles would be removed by His power.

Certainly I will be with thee - This great event shall not be left to thy wisdom and to thy power; my counsel shall direct thee, and my power shall bring all these mighty things to pass.

And this shall be a token - Literally, And This to thee for a sign, i.e., this miraculous manifestation of the burning bush shall be a proof that I have sent thee; or, My being with thee, to encourage thy heart, strengthen thy hands, and enable thee to work miracles, shall be to thyself and to others the evidence of thy Divine mission.

Ye shall serve God upon this mountain - This was not the sign, but God shows him, that in their return from Egypt they should take this mountain in their way, and should worship him in this place. There may be a prophetic allusion here to the giving of the law on Mount Sinai. As Moses received his commands here, so likewise should the Israelites receive theirs in the same place. After all, the Divine Being seems to testify a partial predilection for this mountain, for reasons that are not expressed. See Clarke's note on Exodus 3:5.

And he said, certainly I will be with thee,.... To encourage and strengthen him; to protect, defend, and preserve him, and to succeed and prosper him; to give him credit and respect with the people of Israel, and influence over Pharaoh to prevail upon him at length to let Israel go:

and this shall be a token unto thee that I have sent thee; not the promise now made, nor the vision he had seen, but what follows:

when thou hast brought forth the people out of Egypt, ye shall serve God upon this mountain: Mount Horeb or Sinai, as they did at the time of the giving of the law on it, when an altar was built upon a hill, and they offered burnt offerings and peace offerings, Exodus 24:4 and this was a sign, "a posteriori", confirming the divine mission of Moses; and besides the promise of this, on which Moses might depend, being made by the Lord, assured him of success, that he should bring the children of Israel out of Egypt, since he and they would serve the Lord together at this mountain, and from whence he might conclude he had a mission and commission from God. Of a like kind is the sign or token given of the deliverance of Jerusalem from the army of Sennacherib, Isaiah 37:30.

And he said, {m} Certainly I will be with thee; and this shall be a token unto thee, that I have sent thee: When thou hast brought forth the people out of Egypt, ye shall serve God upon this mountain.

(m) Neither fear your own weakness, or Pharaoh's tyranny.

3:12 Certainly I will be with thee - Those that are weak in themselves, yet may do wonders being strong in the Lord, and in the power of his might. God's presence puts wisdom and strength into the weak and foolish, and is enough to answer all objections.

3:11-15 Formerly Moses thought himself able to deliver Israel, and set himself to the work too hastily. Now, when the fittest person on earth for it, he knows his own weakness. This was the effect of more knowledge of God and of himself. Formerly, self-confidence mingled with strong faith and great zeal, now sinful distrust of God crept in under the garb of humility; so defective are the strongest graces and the best duties of the most eminent saints. But all objections are answered in, Certainly I will be with thee. That is enough. Two names God would now be known by. A name that denotes what he is in himself, I AM THAT I AM. This explains his name Jehovah, and signifies, 1. That he is self-existent: he has his being of himself. 2. That he is eternal and unchangeable, and always the same, yesterday, to-day, and for ever. 3. That he is incomprehensible; we cannot by searching find him out: this name checks all bold and curious inquiries concerning God. 4. That he is faithful and true to all his promises, unchangeable in his word as well as in his nature; let Israel know this, I AM hath sent me unto you. I am, and there is none else besides me. All else have their being from God, and are wholly dependent upon him. Also, here is a name that denotes what God is to his people. The Lord God of your fathers sent me unto you. Moses must revive among them the religion of their fathers, which was almost lost; and then they might expect the speedy performance of the promises made unto their fathers.