Related for Chullin 271:7
לילף מראשית הגז
one might draw an analogy from the law of the first of the fleece: as there what is held jointly is exempt so here what is held jointly is exempt, the Divine Law stated: From them that slaughter a slaughtering.<span class="x" onmousemove="('comment',' Ibid. XVIII, 3. The plural in this verse indicates that though the animal is held jointly by several people it is still subject to the dues.');"><sup>6</sup></span>
Tosefta Terumot
We do not take terumah from produce [that is harvested] before it is one-third ripe (cf. Hallah 1:3). How do you know if it is one-third ripe or if not? If it is planted and something has sprouted, it is known that it one-third ripe. If it is planted and something has not sprouted, it is known that it is not one-third ripe.
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