The people came to Aaron & gave him gold. They asked Aaron to make idol for them to worship.
Aaron made a golden calf. The Hebrew people were feasting & dancing...
The Lord saw this. He was about to consume this nation & He wanted to make new nation out of Moses...
Moses prayed to forgive them.
But when Moses came down with the tables, he saw the golden calf & people dancing . He was so upset that he broke the tables that were written by God's own hand on the mountain. Then Moses destroyed the calf.
People knew that they committed a great sin... Moses had to go back on the mountain for another forty days to bring the tables with God's Commandments.
This time The Hebrew nation was ready to wait & accept what God has to say.