Exodus 32:5-6 New International Version - UK (NIVUK)
5 When Aaron saw this, he built an altar in front of the calf and announced, ‘Tomorrow there will be a festival to the Lord.’ 6 So the next day the people rose early and sacrificed burnt offerings and presented fellowship offerings. Afterwards they sat down to eat and drink and got up to indulge in revelry.
Exodus 32:17-19 New International Version - UK (NIVUK)
17 When Joshua heard the noise of the people shouting, he said to Moses, ‘There is the sound of war in the camp.’
18 Moses replied:
‘It is not the sound of victory,
19 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.