Midrash for Chullin 269:39
סד"א
Whence do you gather this? - Because [we have learnt:] R'Jose said: Is it not the case that, in connection with animal offerings, if one said: 'Let the foot of this anim a burnt-offering', the whole animal is consecrated as a burnt-offering?<span class="x" onmousemove="('comment',' V. Tem. 10a, and supra 69b. R. Jose puts forward this argument to prove that where the foot of an animal was designated as a substitute for an already consecrated animal, the whole animal thereby becomes consecrated.');"><sup>21</sup></span>
Sifrei Devarim
"your flock": and not that of others (i.e., of gentiles [that you have purchased]). From here it was ruled that one who purchases the shearing of a flock belonging to gentiles is exempt from the (obligation of) the first of the shearing. The shearing of his flock (that he purchased) from his neighbor — if the seller left over (of the shearing itself) for himself, the seller is liable (for the first of the shearing); if he did not, (i.e., if he told the buyer: The first of the shearing of the Cohein is with you), the buyer is liable.
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Sifrei Devarim
"shall you give to him": There must be enough for a gift — whence they ruled: How much does he give him? The weight of five selaim in Yehudah, which is ten in the Galil, cleansed, for the making of a small garment.
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