Reference for Shabbat 32:3
מ"ט משום גדר מי חטאת נגעו בה
Now, that is well on the view that they [the Sages] did not rule thus in respect of all forms of defilement but only in respect of the defilement of the dead:<span class="x" onmousemove="('comment',' Only then is the former uncleanness revived.-The verse quoted in n. 2. refers to such. ');"><sup>7</sup></span> then it is correct. But on the view that they ruled thus for all forms of uncleanness, what can be said? — Abaye answered: As a preventive measure lest he might not perforate it to the standard of purification.<span class="x" onmousemove="('comment',' The hole which removes its status of a utensil must be of a certain size, — large enough to permit a pomegranate to fall through. ');"><sup>8</sup></span> Raba said: As a preventive measure lest it be said that tebillah<span class="x" onmousemove="('comment',' V. Glos. ');"><sup>9</sup></span>