When the Israelites saw that Moses delayed to come down out of the mountain, they made a golden calf and worshiped it.

When Moses went down from Mount Sinai, he was so angry at the sight of the Israelites worshiping the golden calf that he broke the tablets.

In Numbers 13 and Numbers 14:1-38, it is recorded that Moses sent 12 spies to explore the land Canaan and that the Israelites were punished by God for complaining against God after listening to the 10 spies who brought up an evil report.

Korah and his followers disobeyed the guidance of Moses and betrayed him, which resulted in being swallowed by the earth.