Rashi on Leviticus 4:20/רש"י על ויקרא ד׳:כ׳

1ועשה לפר AND HE SHALL DO WITH THE BULLOCK — with this bullock —כאשר עשה לפר החטאת AS HE DID WITH THE BULLOCK FOR A SIN-OFFERING – i. e. as is expressly set forth in the case of the bullock of the anointed priest. This statement thus serves to bring under the command of offering the fat portions the lobe of the liver and the two kidneys which are not expressly mentioned there but which are not expressly mentioned here; and it serves also to repeat the command referring to these rites, teaching thereby that if he (the anointed priest) omitted one of all the applications of the blood it (the sacrifice) becomes invalid (Sifra, Vayikra Dibbura d'Chovah, Chapter 6 5). Since we find in regard to blood which had to be placed on the outer altar, that if he places it there by one application alone he nevertheless effected atonement (cf. Mish. Zevachim 4:1), Scripture was compelled to intimate here that the omission of one application impedes the validity of the rite (Zevachim 39a).