13 And Moses said to God, Behold, [when] I come unto the children of Israel, and shall say unto them, The God of your fathers hath sent me unto you; and they shall say, What is his name? what shall I say unto them? 14 And God said to Moses, I AM THAT I AM. And he said, Thus shalt thou say unto the children of Israel: I AM hath sent me unto you. 15 And God said moreover to Moses, Thus shalt thou say unto the children of Israel: Jehovah, the God of your fathers, the God of Abraham, the God of Isaac, and the God of Jacob, hath sent me unto you. This is my name for ever, and this is my memorial unto all generations.

16 Go and gather the elders of Israel together, and say unto them, Jehovah the God of your fathers, the God of Abraham, Isaac, and Jacob, hath appeared to me, saying, I have indeed visited you, and [seen] that which is done unto you in Egypt;

Matthew Henry's Commentary on Exodus 3:13-16

Commentary on Exodus 3:11-15

(Read Exodus 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.

Commentary on Exodus 3:16-22

(Read Exodus 3:16-22)

Moses' success with the elders of Israel would be good. God, who, by his grace, inclines the heart, and opens the ear, could say beforehand, They shall hearken to thy voice; for he would make them willing in this day of power. As to Pharaoh, Moses is here told that petitions and persuasions, and humble complaints, would not prevail with him; nor a mighty hand stretched out in signs and wonders. But those will certainly be broken by the power of God's hand, who will not bow to the power of his word. Pharaoh's people should furnish Israel with riches at their departure. In Pharaoh's tyranny and Israel's oppression, we see the miserable, abject state of sinners. However galling the yoke, they drudge on till the Lord sends redemption. With the invitations of the gospel, God sends the teaching of his Spirit. Thus are men made willing to seek and to strive for deliverance. Satan loses his power to hold them, they come forth with all they have and are, and apply all to the glory of God and the service of his church.