Reference for Bava Kamma 209:12

ואמר רבא הרי אמרו חבית שניקבה וסתמוה שמרים הצילוה בעי רבא אגף חציה מהו

Raba also said: It has been stated that if an earthenware barrel<span class="x" onmousemove="('comment',' That was covered on all sides. ');">²⁹</span> had a hole which was filled up with lees, they would render it safe [and secure<span class="x" onmousemove="('comment',' From becoming defiled. ');">³⁰</span> while in a tent where a corpse of a human being was kept, as the barrel would be considered to have a covering tightly fastened upon it].<span class="x" onmousemove="('comment',' And thus not be subject to Num. XIX, 15. ');">³¹</span>

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