ערלה ג׳:ב׳ - ג׳:ג׳

מלא הסיט – it is according to the suspension between the fore-arm to the finger – all what he is able to widen it, and the suspension that is between the thumb to the finger, all that he one is able to widen it, which is a double “sit” (the double size of the “sit” – the distance between the tip of the thumb and that of the index finger when held apart, or between the root of the thumb and the tip of the index finger, when the former is leaning against the latter – see also Tractate Shabbat, Chapter 13, Mishnah 4), because it is double from what lies between the forearm and the finger. And within the distance of a “sit” is an important measurement for prohibition. Therefore, when they have weaved in the cloth, and it is not known which it is, Rabbi Meir states, according to his reasoning, that it (i.e., the entire cloth) should be burned, and the Sages state that it is neutralized in one and two-hundred , according to their reasoning as seen in the dispute of above (see Mishnah 1 of this chapter).

מצמר הבכור – and it is prohibited to shear the first born [sheep], as it states (Deuteronomy 15:19): “or shear your firstling sheep,” and it is speaking about a first born with a defect, and for this reason, it requires the distance of the breadth between the tip of the thumb and of the index finger when held apart, for had it been a simple firstling, they are sanctified, as it is taught (in this Mishnah): [hair from other] Holy Things, it renders sanctified [prohibited] in any quantity whatsoever [even less than a “sit’s” length].

משער הנזיר – and its hair is prohibited [to derive] benefit from it, as it states (Numbers 6:5): “it shall remain consecrated,… the hair of his head being left to grow untrimmed;” the growth of his hair will be holy.

ופטר חמור – after breaking the neck of the heifer (see Deuteronomy 21:4), all the world admits that it is prohibited to [derive from it] benefit for we draw a conclusion by analogy of "עריפה עריפה" from the heifer whose neck was broken (Deuteronomy 21:6).

בשק – concerning the wool, it teaches [in the Mishnah] the cloth, and concerning the hair, it teaches [in the Mishnah], sack, for this is the [normal] manner.