Related for Chullin 271:20
אלא גגך למאי אתא
although it is written: For thy roof,<span class="x" onmousemove="('comment',' Cf. Deut. XXII, 8, where it enjoined to erect a parapet around the roof of the house to prevent accidental falling off.');"><sup>16</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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