Chabad.org — English translation + Rashi
Torah Temimah points to Menachos 21b.
E-Daf.com — Menachos 21b
HebrewBooks / Shas PDF
English: “And he shall put frankincense on it” — and then “and he shall bring it to the sons of Aharon”: this teaches that frankincense is brought from his own house.
Diyuk of the order before delivery to the kohanim — the frankincense is placed by the owner from his own supply.
The owner supplies the levonah from home; it is not taken from Temple stock. The verse first requires placing frankincense on the flour and only afterward bringing the offering to the sons of Aharon, teaching that the frankincense comes from the donor’s own house.