פירוש על ויקרא 4:25

ואת דמו [AND HE SHALL POUR OUT] THE BLOOD — i. e. the remainder of the blood (cf. Rashi on v. 7).

AND THE REMAINING BLOOD THEREOF SHALL HE POUR OUT AT THE BASE OF THE ALTAR OF BURNT-OFFERING. This is the same altar already mentioned [in the first part of the verse: and he shall put it upon the horns of the altar of burnt-offering]. But such is the linguistic expression of the [Hebrew] language to mention the subject instead of [merely] the definite article [thus repeating “of burnt-offering” rather than just saying “the altar”]. Similarly, and he shall lay his hand upon the head of the bullock, and he shall slaughter the bullock.³³⁰Above, Verse 4. Our Rabbis have Midrashic interpretations on these verses, for the law of the Eternal is perfect,³³¹Psalms 19:8. there being nothing in it which is omitted or redundant.

מזבח העולה , the altar outside the sanctuary. This blood was not to be smeared on the interior altar as was the blood of the sin offering of the High Priest, or that of the sin-offering on behalf of the community at large. (verse 16-17).

The remnants of its blood. But not all of its blood, because he already put some of it on the corners of the altar.

על קרנות מזבח העולה, “on the horns (corners) of the altar for burnt offerings.” When either the High Priest or the community offers a sacrifice (sin offering), the blood for the atonement through these sacrifices is considered before the Almighty as if it had been offered inside the Sanctuary and having been sprinkled on the dividing curtain and on the golden altar. By the same token, the sins for which atonement had been sought may be perceived as if they had been cast out even beyond the three Camps of the Israelite nation, all according to the severity of the sin to be atoned for. If either the secular head of the people or another person find themselves in the same position, seeing that they are not so highly ranking individuals do not bother to offer the required sacrifice and do not consider either the blood of it or its entrails etc, the blood of their sacrifices is offered on the altar in the courtyard of the Temple, and the meat of these sacrifices may be consumed. (based on B’chor shor end of Vayikra)