Exodus 32:20-23

20And he took the calf which they had made, and burnt it in the fire, and ground it to powder, and scattered it upon the water, and made the children of Israel drink of it .

21And Moses said to Aaron, What did this people to thee, that thou hast brought so great a sin upon them? 22And Aaron said, Let not the anger of my lord burn: thou knowest the people, that they are set on evil. 23For they said to me, Make us gods, which shall go before us: for as for this Moses, the man that brought us out of the land of Egypt, we know not what is become of him.