Parashas Vayakhel · Passuk 35:3
Torah Temimah points to classical source on this unit (verified).
English: “On the Shabbos day” — you may not kindle on Shabbos, but you may kindle on Yom Tov.
Derash from the specified day: kindling forbidden on Shabbos but permitted on Yom Tov.
The phrase “on the Shabbos day” distinguishes Shabbos from Yom Tov for the laws of kindling.