Leviticus 7:18

אם האכל יאכל וגו' ‏ AND IF ANY [OF THE FLESH] SHOULD BE EATEN AT ALL [ON THE THIRD DAY) — Scripture is speaking of one who has the intention whilst slaughtering thė sacrifice to eat it (the flesh) on the third day. One might think that what the text really means is, that if one has eaten of it on the third day it becomes disqualified retrospectively (i. e., that it is regarded as having been invalid from the moment that it was offered)! Scripture, however, states, “As for him that offereth it, there shall be no מחשבה to him” implying that at the time when it is offered it can become disqualified, and that it cannot become disqualified on the third day (Sifra, Tzav, Section 8 1). And the following is its meaning (that of the text): At the time when it is offered, this shall not enter the mind of any priest performing a rite with it, to eat of it on the third day, and if he does harbour such a thought, it becomes פגול, an abominable thing, והנפש האכלת ממנו AND THE SOUL THAT EATETH OF IT even within this period (of three days), עונה תשא SHALL BEAR ITS INIQUITY.

וְאִ֣ם הֵאָכֹ֣ל יֵ֠אָכֵ֠ל מִבְּשַׂר־זֶ֨בַח שְׁלָמָ֜יו בַּיּ֣וֹם הַשְּׁלִישִׁי֮ לֹ֣א יֵרָצֶה֒ הַמַּקְרִ֣יב אֹת֗וֹ לֹ֧א יֵחָשֵׁ֛ב ל֖וֹ פִּגּ֣וּל יִהְיֶ֑ה וְהַנֶּ֛פֶשׁ הָאֹכֶ֥לֶת מִמֶּ֖נּוּ עֲוֺנָ֥הּ תִּשָּֽׂא׃

And if any of the flesh of the sacrifice of his peace offering be eaten at all on the third day, it shall not be accepted, neither shall it be imputed to him who offers it: it shall be an abomination, and the person that eats of it shall bear his iniquity.