Reference for Chullin 257:32

אמר רב מתנה הרי אמרו

the uncleanness thereof<span class="x" onmousemove="('comment',' The stalks, although they contain grain, can no longer be regarded as foodstuffs but form the roof of the house; and if the house was stricken with a leprous plague, this roof as well as the walls and the rest of the house would be unclean and render men and vessels unclean.');">²⁰</span>

Jastrow

Jastrow