Exodus 32:17-19
When Joshua heard the noise of the people shouting, he said to Moses, "There is the sound of war in the camp."
Moses replied:
"It is not the sound of victory, it is not the sound of defeat; it is the sound of singing that I hear."
When Moses approached the camp and saw the calf and the dancing, his anger burned and he threw the tablets out of his hands, breaking them to pieces at the foot of the mountain.