Ephrem the Syrian

For Moses ground to powder the calf and caused them to drink it in the water of ordeal; that by drinking of the calf all those who were living for its worship might die. For the sons of Levi ran upon them, those who ran to help Moses and girded on their swords. For the sons of Levi did not know whom they should slay, because those that worshipped were mingled with those that worshipped not. …

Homily - On Our Lord ↗

Augustine of Hippo

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.

Explanation Of The Psalms 89:23 ↗

Ambrose of Milan

Moses ground the head of the golden calf to powder, and cast it into water, and made the people drink of it; for their heart was hardened by the greatness of their perfidy, and he did thus that it might be softened and made refined by faith. Lastly, that woman who grinds meal well and fine shall be taken, but she who grinds ill shall be left.

Letter 64.3 ↗