Parashas Bo · Shemos 12:5 · TT note 5
Torah Temimah on Shemos 12:5, note 5 (on מִן־הַכְּבָשִׂים וּמִן־הָעִזִּים) points to Mechilta.
Sefaria — Exodus 12:5
Sefaria — Torah Temimah on Exodus 12:5
Sefaria — Mechilta
English: “From the sheep and from the goats” — might one take from both together as one? We learn by kal va-chomer: if an olah, which is stricter, is valid from one species, then a Pesach, which is lighter, all the more so [from one species only].
Kal va-chomer from olah: one animal, one species — not a mixed pair.
The Pesach is taken from sheep or from goats, one species per offering.