Reference for Chullin 173:52

אמר רבה בר בר חנה אמר רבי יוחנן

And why is it different from the following which was taught: If a person slaughtered and the blood was absorbed in the earth he must nevertheless cover it up?<span class="x" onmousemove="('comment',' In other words, the blood was covered up by the earth as by the wind in our Mishnah, yet the Baraitha teaches that he must cover it up.');">¹⁷</span>

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