9:13,14
What are we to make of this? The Lord is ready to destroy the people, and to make a nation out of Moses. Now there are a number of facts to take account of. First, Moses intervened as we shall soon see, and God knew that he would do this. Secondly, making a nation out of Moses would not have helped matters in the long run, for Moses too was a sinner. The sentiment expressed was real. The people were no good, and the only just decision was to destroy them. But that was not God's intention. And God involves men in what he is doing. He wanted Moses to intervene in the way that he did, and later on Jesus would intervene on our behalf in a much greater way.
9:15,16
Moses went down the hill with the stone tablets. This should have been a time of triumph, but instead was a day of sorrow and disaster. The mountain was still blazing with fire, then he saw that the people had indeed made a calf image. They had quickly turned away from the Lord's command. This was the nature of the people, and Moses wanted to remind them of this.