Reference for Temurah 4:33

אמר רבא

he cannot effect an exchange?<span class="x" onmousemove="('comment',' For Scripture says: He shall not alter it nor change it . . Then it and the exchange thereof shall be holy. We therefore say anyone to whom this prohibitory law and the penalty attached thereto apply, can perform an exchange, but as the prohibition and the penalty are not relevant to a minor, therefore his exchange is not valid.');">²³</span>

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