And 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.
All Commentaries on Exodus 32:20 Go To Exodus 32
Augustine of Hippo
AD 430
For Moses ground down the calf’s head, and sprinkled it upon the water, and made the children of Israel drink it. All the unbelieving are ground: they believe by degrees; and they are drunk by the people of God and pass into Christ’s body.