Deuteronomy 9:21
And I took your sin, the calf which ye had made, and burnt it with fire, and stamped it, and ground it very small, even until it was as small as dust: and I cast the dust thereof into the brook that descended out of the mount.
And I took your sin, the calf which ye had made,.... Which was the object of their sin, which lay in making and worshipping it; see Isaiah 31:7
and burnt it with fire, and stamped it; with his feet after it was burnt, to bring it into small pieces:
and ground it very small; or, as the Targum of Jonathan,
"ground it in a mortar well;''
the burnt and broken pieces:
even until it was as small as dust; being ground to powder, as in
and I cast the dust thereof into the brook that descended out of the mount; and made the children of Israel to drink of it, as in the previously mentioned place; See Gill on "Exodus 32:2"; all this was done before the prayer for Aaron and the people.