Halakhah for Sotah 31:4
כי תיבעי לך אליבא דבית הלל דאמרי מצינו אפר שקרוי עפר מאי אע"ג דאיקרי עפר הכא בקרקע המשכן כתיב או דילמא האי בקרקע המשכן לכדאיסי בן יהודה ולכדאיסי בן מנחם הוא דאתי
how much more so [is it unnecessary to differentiate]. Why, then, does the text state 'on the floor of the tabernacle'? He may not take it from the midst of a heap.<span class="x" onmousemove="('comment',' It must first be scattered on the floor. [In contradiction to the second Baraitha cited which permits the bringing in dust from elsewhere and putting it forthwith into the water]. ');"><sup>4</sup></span>
Sefer HaChinukh
From its laws is that which they, may their memory be blessed, said (Sotah 16a), "How is the shaving? He passes the razor over his visible flesh - and even [on] the underarm and the pubic area and all the rest of the body - until he becomes [smooth] like a gourd, as it is stated (Leviticus 14:9), 'all of his hair.'" And when he shaves the two shavings, he only shaves with a razor. But if he shaved not with a razor - or he left two hairs - [it is as if] he has not done anything. And the rest of its details are in Tractate Negaim (see Mishneh Torah, Laws of Defilement by Leprosy 10).
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