Related for Chullin 271:30
בהמת השותפין חייבת במתנות ור' אלעאי פוטר
What is his reason? - He draws an analogy by means of the common expression 'giving' from the law of the first of the fleece; just as there what is held jointly is exempt so here what is held jointly is exempt.
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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