Chabad.org — English translation + Rashi
Torah Temimah points to Menachos 61a.
E-Daf.com — Menachos 61a
HebrewBooks / Shas PDF
English: “Its memorial portion” — from here that the kometz and the frankincense are the azkarah.
Definition of azkarah — the memorial portion consists of the kometz together with the levonah.
What goes up on the altar as the memorial is the handful together with the levonah. The Torah’s designation “its memorial portion” is understood to identify the azkarah as the combined offering of the kometz and the frankincense.