Parashas Acharei Mos · Passuk 17:06
Chabad.org — English translation + Rashi
Torah Temima points to Pesachim 79b.
English: If a kezayit of flesh or of chelev remains, the blood is still tossed; “for a pleasing aroma” includes the lobe of the liver and the two kidneys as well.
Minimum remainder for zerikah
Blood service remains valid when only a minimal amount of flesh or fat (or the specified organs) is left to be burned.