Leviticus 6:3

מדו בד HIS LINEN ROBE — this is what is elsewhere termed the כתונת, the undercoat; and why then is it here called מדו? To intimate that it (the כתונת) must be made to his measure (מדו from מדד to “measure”) (Sifra, Tzav, Chapter 2 1; Yoma 23b). על בשרו [AND LINEN DRAWERS HE SHALL PUT] UPON HIS FLESH — This implies that nothing should interpose between them (cf. Sifra, Tzav, Chapter 2 3; Zevachim 19a). והרים את הדשן AND HE SHALL TAKE UP THE ASHES — He raked a full pan of ashes from the innermost consumed mass of ashes and deposited them at the east side of the כבש (the inclined plane leading up to the altar) (Sifra, Tzav, Chapter 1 4 Yoma 20a; cf. Jerusalem Talmud Yoma 2:1). העולה‎ את ‎‏ אשר תאכל האש‎הדשן ‎ [HE SHALL TAKE OUT] THOSE ASHES INTO WHICH THE FIRE HATH CONSUMED THE BURNT OFFERING — and thus has made it into ashes; from those ashes he shall take out a תרומה, a portion, ושמו אצל המזבח AND PUT IT BESIDE THE ALTAR. [על המזבח [THE BURNT OFFERING] ON THE ALTAR — This implies that if he (the priest) finds any limbs of the burnt offering that were not yet consumed he shall put them back on the altar after having raked the coals hither and thither and having taken from the innermost ashes, because it states, העולה על המזבח ‎את ‎which implies: the burnt offering (i.e.so long as it can be called an עולה and not דשן) must be ‎on the altar] (Sifra, Tzav, Chapter 1 5; Yoma 45b; cf. Rashi there s. v. ‎אשר תאכל ‎ את העולה‎).

וְלָבַ֨שׁ הַכֹּהֵ֜ן מִדּ֣וֹ בַ֗ד וּמִֽכְנְסֵי־בַד֮ יִלְבַּ֣שׁ עַל־בְּשָׂרוֹ֒ וְהֵרִ֣ים אֶת־הַדֶּ֗שֶׁן אֲשֶׁ֨ר תֹּאכַ֥ל הָאֵ֛שׁ אֶת־הָעֹלָ֖ה עַל־הַמִּזְבֵּ֑חַ וְשָׂמ֕וֹ אֵ֖צֶל הַמִּזְבֵּֽחַ׃

And the priest shall put on his linen garment, and his linen breeches shall he put on his flesh, and take up the ashes which the fire has consumed with the burnt offering on the altar, and he shall put them beside the altar.