Reference for Chullin 259:27

אלא טעמא דכתב רחמנא זה הא לאו הכי הוה אמינא

of unconsecrated animals since they are [also] subject to the law of the Firstling!<span class="x" onmousemove="('comment',' Whereas consecrated animals are not subject to the law of the Firstling, consequently they should neither be subject to the priestly dues.');">²³</span>

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