Keilim24: 7
שָׁלֹשׁ פִּנְקְסָיוֹת הֵן: הָאֶפִיפוֹרִין — טְמֵאָה מִדְרָס. וְשֶׁיֶּשׁ בָּהּ בֵּית קִבּוּל שַׁעֲוָה — טְמֵאָה טְמֵא מֵת. וַחֲלָקָה — טְהוֹרָה מִכְּלוּם.
There are three pinkases: An aphiphorin [is susceptible to becoming] tamei with midras [tumah]. [A pinkas] that has a receptacle for wax [is susceptible to becoming] tamei with corpse-tumah. And a smooth [pinkas] is tahor from any [form of tumah].