Reference for Bekhorot 118:30

היו לו י"ד טלאים והכניסן לדיר ויצאו ששה בפתח זה וארבעה בפתח זה וארבעה נשתיירו שם

For it Says: LET THEM GO TO PASTURE!<span class="x" onmousemove="('comment',' If therefore the lamb that leaped was hullin, 'why should it be condemned to pasture until blemished? The reason must therefore be because it is actually tithe, possessing the holiness of an animal set aside as tithe, and concerning each animal there is a doubt whether it be tithe.');">²³</span>

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