Reference for Shabbat 117:5
איפוך קמייתא ומאי חזית דאפכת קמייתא איפוך בתרייתא
R. Eleazar said: In cases of midras<span class="x" onmousemove="('comment',' Lit., 'treading'. The uncleanness caused by a zab's treading, leaning against, or weighing down upon an article, even if he does not actually touch it with his body. This includes sitting. ');"><sup>8</sup></span> we say. 'Get up, that we may do our business'; but we do not say in the case of the defilement of the dead, 'Get up, that we may do our business!'<span class="x" onmousemove="('comment',' I.e., in respect of an article's defilement through a corpse, or by a person who was himself defiled by a corpse, we do not say that in order to become unclean or remain unclean it shall be fit for its main purpose, but even if one has to say to the person using it, 'Get up, that we may do our business' it is still subject to the laws of uncleanness. ');"><sup>9</sup></span>