The last instruction that Moses receives on Mount Sinai, before God gives him the inscribed tablets, before the incident of the Golden Calf, is the reminder about the importance of the sabbath.
This week's Torah portion contains one of the most dramatic events in the entire Torah, the incident of the Golden Calf. Moses has been on Mount Sinai for a very long time, too long for those Israelites who still carry Egypt in their hearts to wait.
In Parashat Ki Tisa, the Israelites wait for Moses to return from the mountaintop. Feeling insecure with a lack of leadership, they tell Aaron to create a Golden Calf.