Then the Lord said, “I have seen how stubborn and rebellious these people are. Now leave me alone so my fierce anger can blaze against them, and I will destroy them. Then I will make you, Moses, into a great nation.”
Moses had many frustrations with the Israelites. He had complained to God on multiple occasions about them. But when God told Moses that He was going to wipe them out, Moses pleaded with God to relent.