Midras Imamat 8:25: Sifra

וַיִּקַּ֞ח אֶת־הַחֵ֣לֶב וְאֶת־הָֽאַלְיָ֗ה וְאֶֽת־כָּל־הַחֵלֶב֮ אֲשֶׁ֣ר עַל־הַקֶּרֶב֒ וְאֵת֙ יֹתֶ֣רֶת הַכָּבֵ֔ד וְאֶת־שְׁתֵּ֥י הַכְּלָיֹ֖ת וְאֶֽת־חֶלְבְּהֶ֑ן וְאֵ֖ת שׁ֥וֹק הַיָּמִֽין׃

Lalu ia mengambil lemak, ekor gemuk, seluruh lemak yang ada pada isi perut, umbai hati, kedua ginjal beserta lemaknya, dan paha kanan.

Sifra

23) (Vayikra 8:25): "And he took the fat": There is no thing (i.e., there is no gift given to a man) where there is no mitzvah for the L–rd (Thus, "And he took the fat, etc."): Fruits have many mitzvoth: terumoth, ma'asroth, challah, bikkurim, leket, shikchah, and peah. The gates of houses and of provinces have their mitzvoth to the L–rd, (Devarim 6:9): "And you shall write them on the doorposts (mezuzoth) of your house and on your gates."
Tanya RabiBookmarkShareCopy

Sifra

24) Garments have their mitzvah to the L–rd, viz. (Devarim 22:11): "You shall not wear sha'atnez." A ta'alith, (Devarim 22:12): "Fringes shall you make for yourself."
Tanya RabiBookmarkShareCopy

Sifra

25) A clean beast has its mitzvah to the L–rd, viz. (Devarim 15:19): "Every firstling (bechor) which is born in your herd and in your flock, the male, shall you consecrate to the L–rd your G d."
Tanya RabiBookmarkShareCopy