Related for Chullin 271:52
אי מה תרומה מחדש על הישן לא אף ראשית הגז מחדש על הישן לא
so in the case of the first of the fleece one should not give new [fleece as the due] for old? - This is indeed so; for it has been taught: If a man had two lambs and he sheared them and kept [the wool], and [next year] again sheared them and kept [the wool], and so he did for two or three years, they are not to be reckoned together.<span class="x" onmousemove="('comment',' Even though he has now accumulated five fleeces; for there must be five fleeces from five sheep.');"><sup>37</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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