Reference for Avodah Zarah 3:10

כֵּיצַד מְבַטְּלָהּ. קִרְסֵם, וְזֵרַד, נָטַל מִמֶּנָּה מַקֵּל אוֹ שַׁרְבִיט, אֲפִלּוּ עָלֶה, הֲרֵי זוֹ בְטֵלָה. שְׁפָיָהּ לְצָרְכָּהּ, אֲסוּרָה. שֶׁלֹּא לְצָרְכָּהּ, מֻתֶּרֶת:

How dos he [a gentile] nullify it [an asheirah]? If he plucks them [twigs of the asheirah, to burn for his purposes] or he cuts off [its wet leaves], or if he takes from it a stick or a staff, or even a leaf, it is nullified. If he files it [shefayah (see Targum [veshafith] on Devarim 9:21) ] — if for its own need [i.e., to beautify it], it is forbidden; if not, it is permitted. [And only an adult gentile, who is knowledgeable in idolatry and its appurtenances can nullify idolatry. And even if he is forced to do so, his nullification stands.]

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