Reference for Temurah 49:3

ולדות קדשים בהוייתן הן קדושין

for if we were to think that they are holy from [the time of their existence] inside their mother, why should not holiness attach to them [tumtum etc.] since they receive the holiness of their mother?<span class="x" onmousemove="('comment',' From the time when they begin to develop little by little in the inside of their mother, they should be holy.');">³</span>

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