Parashas Bo · Shemos 12:8 · TT note 7
Torah Temimah on Shemos 12:8, note 7 (on בַּלַּיְלָה הַזֶּה) points to Berachos 9a.
Sefaria — Exodus 12:8
Sefaria — Torah Temimah on Exodus 12:8
Sefaria — Berachos 9a
E-Daf — Berachos 9a
English: It comes to exclude another night. You might have thought: since the Pesach is light sanctity, and shelamim are light sanctity — just as shelamim are eaten for two days and one night, so the Pesach might be eaten for two nights… Therefore it teaches us “on this night” — it is eaten on this night and not on another night.
Exclusionary derash of הַזֶּה: limits eating to the night of the fifteenth alone.
The Pesach may be eaten only on the night of the fifteenth, not on a second night.