Reference for Kelim 24:8

שָׁלֹשׁ מִטּוֹת הֵן. הָעֲשׂוּיָה לִשְׁכִיבָה, טְמֵאָה מִדְרָס. שֶׁל זַגָּגִין, טְמֵאָה טְמֵא מֵת. וְשֶׁל סָרָגִין, טְהוֹרָה מִכְּלוּם:

There are three types of beds: one made for lying upon is susceptible to <i>midras</i> impurity; one used by glass makers is susceptible to corpse impurity; and one used by weavers is pure from all [types of impurities].

Jastrow

Jastrow