Lévitique 1:9

A pleasing act, for I [G-d] spoke and My will is being followed

And he shall wash the inwards and his legs with water; and the priest shall offer the whole upon the altar of burnt offering an oblation to be accepted with grace before the Lord.

will wash with water This is done either by a kohen or by a Levite. Thus Scripture must specify that the kohen is the one who will kindle .

The word burnt-offering is an adjective, denoting an offering involving fire, and it modifies the word all.

willingly accepted previously explained [comment on Exodus 29:25]

A BURNT-OFFERING. “[He shall burn it] with the intention that it should be a burnt-offering [and not an offering of another category]. ‘ISHEIH’ (A FIRE-OFFERING). When he slaughters it he should slaughter it with the intention of [burning it by] fire, [as will be explained further on]. Wherever the word isheih occurs, it is an expression of fire. PLEASING — it is pleasing to Me that I have commanded and My will was done.” This is the language of Rashi.
Now the Rabbi did not explain what is meant by “the intention of [burning it by] fire.” In the Gemara the Rabbis have said: “this is to exclude kabobo, which may not be done.” Now the commentators. explained this to mean that he should slaughter it with the intention of placing it on flames burning the pile of wood upon the altar, and not of placing it upon dying coals which are in the process of being extinguished. To me it appears that the intention he needs to have is that the fire should burn it completely, and not that it should just be roasted there a little, the word kabobo being similar to the expression of the Rabbis in the chapter entitled “A stubborn and rebellious son: ” “k’basar kiba (like partly-roasted meat) which thieves eat.” In Tractate Erubin we also find: “v’nichbeiv (let him roast it) and eat it.” Now some books have a reading in Tractate Zebachim: “this is to exclude gabobo (straw), which may not be done.” Accordingly the meaning thereof is that he should have the intention to put it on a fire of wood, as it is written, on the wood that is on the fire, and he should not intend to put it upon a fire made of stubble and straw, similar to that which we have been taught [in a Mishnah]: “If a double-stove had been heated with stubble and gabobo.”
Now this verse mentions a reason for the offerings, namely, that they are a fire-offering, of a pleasing odor unto the Eternal. The Rabbi [Moshe ben Maimon] wrote in the Moreh Nebuchim that the reason for the offerings is because the Egyptians and the Chaldeans in whose lands the children of Israel were strangers and sojourners, used always to worship the herd and the flock, the Egyptians worshipping the sheep and the Chaldeans worshipping the demons whom they imagined as assuming the form of goats. To this day men of India never slaughter the herd. It was for this reason that He commanded [Israel] to slaughter these three species [of cattle: the herd, the flock, and the …

וכרעיו, its legs.

וקרבו, “and its insides;” seeing that these parts are going to be presented at the “King’s” Table, extreme care had to be taken that everything was meticulously clean and no trace of blood was visible. On the other hand, when writing of animals which were not served up on the “King’s” Table but were burned outside sacred grounds, the Torah lumps together “its insides and its excrement,” (Leviticus 4,11) as it does in Leviticus 1,16, and 27 where flesh, skin, and excrement are all being burned at the same time and place.