Parashas Bo · Shemos 12:14 · TT note 2
Torah Temimah on Shemos 12:14, note 2 (on חַג לַה׳) points to Beitzah 19a.
Sefaria — Exodus 12:14
Sefaria — Torah Temimah on Exodus 12:14
Sefaria — Beitzah 19a
E-Daf — Beitzah 19a
English: Beis Hillel say: One may bring shelamim and olos and lean on them. … And Beis Hillel hold: “to Hashem” — whatever is for Hashem.
Inclusive reading of לַה׳: all offerings designated for Hashem may be brought on Yom Tov.
Beis Hillel permit bringing both shelamim and olos on Yom Tov because the verse says “a festival to Hashem” — anything for Hashem.