Reference for Parah 10:3
קָלָל שֶׁל חַטָּאת שֶׁנָּגַע בְּשֶׁרֶץ, טָהוֹר. נְתָנוֹ עַל גַּבָּיו, רַבִּי אֱלִיעֶזֶר מְטַהֵר, וַחֲכָמִים מְטַמְּאִים. נָגַע בְּאֳכָלִים וּמַשְׁקִין וּבְכִתְבֵי הַקֹּדֶשׁ, טָהוֹר. נְתָנוֹ עַל גַּבֵּיהֶן, רַבִּי יוֹסֵי מְטַהֵר, וַחֲכָמִים מְטַמְּאִים:
A <i>kallal</i> [a type of stone or earthenware vessel] of <i>chatat</i> [containing the ashes of a red heifer], which touched a [dead] <i>sheretz</i> [certain types of small creature which are impure when dead], is [still] pure. If it [the <i>kallal</i>] was placed on top [of the <i>sheretz</i>], R Eliezer considers them [the ashes] pure, and the Sages consider them impure. If it touched foods or drinks or holy texts, it is pure. If it was placed on top of them, Rabbi Yose considers it pure, and the Sages consider it impure.