Exodus 34:5

No sooner had Moses got to the top of the mount than God gave him the meeting (Exo 34:5): The Lord descended, by some sensible token of his presence, and manifestation of his glory. His descending bespeaks his condescension; he humbles himself to take cognizance of those that humble themselves to walk with him. Psa 113:6, Lord, what is man, that he should be thus visited? He descended in the cloud, probably that pillar of cloud which had hitherto gone before Israel, and had the day before met Moses at the door of the tabernacle. This cloud was to strike an awe upon Moses, that the familiarity he was admitted to might not breed contempt. The disciples feared, when they entered the cloud. His making a cloud his pavilion intimated that, though he made known much of himself, yet there was much more concealed. Now observe, I. How God proclaimed his name (Exo 33:6, Exo 33:7): he did it in transitu - as he passed by him. Fixed views of God are reserved for the future state; the best we have in this world are transient. God now was performing what he had promised Moses, the day before, that his glory should pass by, Exo 33:22. He proclaimed the name of the Lord, by which he would make himself known. He had made himself known to Moses in the glory of his self-existence and self-sufficiency when he proclaimed that name, I am that I am; now he makes himself known in the glory of his grace, and goodness, and all-sufficiency to us. Now that God is about to publish a second edition of the law he prefaces it with this proclamation; for it is God's grace or goodness that gives the law, especially the remedial law. The pardon of Israel's sin in worshipping the calf was now to pass the seals; and God, by this declaration, would let them know that he pardoned ex mero motu - merely out of…

34:5-9 Moses experienced God’s presence in a revelation of the name, or character, of God. As God had promised (33:19), he showed Moses the glory of his goodness. 34:5-6 Yahweh: Here God is emphasizing his personal name.