Mishpatim: HaKetav v’HaKabalah: Mitzvah 91 – Concept 406
“Nor may the fat of My festive offering remain overnight until morning.” (Exodus 23:18) We may not leave the intestines of the Pesach Offering overnight. (Rambam, Hilchot Korban Pesach – The Laws of The Pascal Offering)
Pesach As An Exercise In Focus:
The idea of Pesach is focus.
We focus as a family.
We focus as a group.
We focus as a nation.
We not only focus on who is involved, but we also focus on accomplishing the Mitzvah in a specific time frame. That is why we may not leave over any of the fat or intestines until the morning: We most focus all our efforts on completing the Mitzvah in a specific time. (Haketav V’Hakabbalah)