Reference for Chullin 233:4

אמר ר' ינאי

AND UNCLEANNESS IS INCURRED BY IT,<span class="x" onmousemove="('comment',' If a person ate the fat of a sacrifice which was rendered piggul or nothar () i.e., what was left over beyond the prescribed time in which the sacrifice must be eaten, or if the person was unclean at the time he ate the fat, he would, in each alternative, incur guilt twice: for eating fat and also for eating piggul etc.');">³</span>

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