Parashas Bo · Shemos 12:3 · TT note 2
Chabad.org — English translation + Rashi
Torah Temimah on Shemos 12:3, note 2 (on בֶּעָשֹׂר לַחֹדֶשׁ הַזֶּה) points to Pesachim 96a.
Sefaria — Exodus 12:3
Sefaria — Torah Temimah on Exodus 12:3
Sefaria — Pesachim 96a
E-Daf — Pesachim 96a
English: From where do we know this? As it is written: “Speak to the whole community of Israel, saying: On the tenth of this month they shall take…” — this one’s taking is from the tenth, but the Pesach of the generations is not taken from the tenth.
Exclusion from the word הַזֶּה (“this”): the requirement to take the lamb on the tenth applies to the Egyptian Pesach, not to the annual Pesach of later generations.
Pesach Mitzrayim had to be selected from the tenth of the month; Pesach doros does not share that same taking-from-the-tenth requirement in the same way.