Avodah Zarah 44A

אשר עשיתם את העגל לקחתי ואשרף אתו באש ואכת אתו טחון היטב עד אשר דק לעפר ואשלך את עפרו אל הנחל הירד מן ההר״!

the calf that you had made, I took and burned it with fire, and beat it in pieces, grinding it very small, until it was as fine as dust; and I cast its dust into the brook that descended out of the mount” (Deuteronomy 9:21)? Moses, who ground up the idolatrous golden calf and dispersed its dust, was apparently unconcerned with the fact that it may fertilize the soil.

אמרו לו: משם ראיה? הרי הוא אומר: ״ויזר על פני המים וישק את בני ישראל״, לא נתכוין אלא לבודקן כסוטות.

The Rabbis said to him: You seek to bring proof from there? Doesn’t it state in the verse: “And he took the calf that they had made, and burned it with fire, and ground it to powder, and strewed it upon the water, and made the children of Israel drink of it” (Exodus 32:20)? Moses ground up the calf intending only to inspect them like sota women, i.e., like a woman suspected by her husband of having been unfaithful. Such a woman is compelled to drink water containing the ground-up ink from a scroll of Torah passages relating to a sota woman, which causes her to die if she was unfaithful, and exonerates her and bestows blessings upon her if she was faithful. Similarly, Moses ground up the calf in order to compel the people to drink, to cause the guilty parties to die.

אמר להם רבי יוסי: והלא כבר נאמר ״וגם את מעכה אמו הסירה מגבירה אשר עשתה מפלצתה וגו׳ וידק וישרף בנחל קדרון״! אמר לו: משם ראיה? נחל קדרון אינו מגדל צמחין!

R' Yosei said to them: But isn’t it already stated concerning Asa: “And he also removed Maacah his mother from being queen, because she had made an abominable image [miflatztah] for an ashera; and Asa cut down her image, and burned it at the Kidron River” (see I Kings 15:13)? It seems that Asa was unconcerned that the ground-up idol may provide fertilization. They said to him: You seek to bring proof from there? The Kidron River does not grow vegetation, so even if the idol would have fertilized the soil, it would have been of no benefit.