ויקרא, פרק כ״ב, פסוק ל׳

A Thanksgiving offering requires a celebratory meal, but this expression of gratitude is bound by a strict and specific timeframe. Since the time limit for eating this offering is already established elsewhere in the Torah, the primary approach among commentators is that the repetition focuses on the mindset of the person slaughtering the animal. The act must be performed with the clear intention that the meat will be consumed within a single day. If the slaughterer plans to eat the meat beyond this allowed window, the entire offering becomes invalid [רש״י, תורה תמימה, משכיל לדוד, רד צ הופמן]. This emphasis also highlights a key distinction between the Thanksgiving offering and regular peace offerings, which are permitted to be eaten over two days [שפתי חכמים, רד צ הופמן]. This strict one-day requirement is an absolute rule, applying even if the person bringing the offering has no intention of publicly celebrating a miracle [העמק דבר].

While a standard day in the context of offerings typically spans twenty-four hours, the timeframe here is further restricted. The meat cannot remain until dawn. The moment morning arrives, any leftover meat is considered invalid, regardless of whether a full twenty-four hours have passed since the slaughter [ביאור יש״ר]. Naturally, this strict boundary applies not only to the meat of the Thanksgiving offering but also, with even greater force, to the animal's fats and to the most holy offerings [רלב״ג].

Beyond the practical rules, this time limit carries a deeper message regarding the performance of Commandments in general. A person should never delay fulfilling God's laws, waiting to complete them in the "morning" of the World to Come. Instead, one must act with urgency to fulfill them today, in this current world [שפתי כהן, קיצור בעל הטורים].

Because a Thanksgiving offering usually involves a relaxed, joyful family feast, clear boundaries must be set from above to maintain the sacred nature of the event [ביאור שטיינזלץ]. A reminder of divine authority is directly attached to these laws so that a person remembers who established them and does not treat the boundaries lightly [רש״י]. This ultimate accountability guarantees that the act of gratitude directed toward God remains completely pure and whole [אבן עזרא].