Números 28:15 Referencias de la Mishná: Mishnah Shevuot, Mishnah Zevachim & Mishnah Pesachim

Where there is no knowledge [of the impurity] either at the beginning or at the end, the goats offered as sin-offerings on festivals and new months bring atonement, the words of Rabbi Judah. Rabbi Shimon says: “The festival goats atone [for such sins] and not the new moon goats. And for what do the new month goats bring atonement? For a pure man who ate impure holy food.” Rabbi Meir says: “All the goats have equal powers of atonement for imparting impurity to the Temple and holy food. Rabbi Shimon used to say: “The new month goats bring atonement for a pure man who ate impure holy food; and the festival goats atone for transgression of the laws of impurity where there was no knowledge either at the beginning or at the end; and the ‘outer’ goat of the Day of Atonement atones for transgression of these laws where there was no knowledge at the beginning but there was knowledge at the end. They said to him: “Is it permitted to offer up the goat set apart for one day on another?” He said to them: “Let it be offered.” They said to him: “Since they are not equal in the atonement they bring how can they take each other's place?” He replied: “They are all at least equal [in the wider sense] in that they bring atonement for transgressions of the laws of impurity in connection with the temple and holy food.”

[Concerning] public and private hatats: (These are the public hatats: the goats of new moons and festivals) They are slaughtered in the north, and their blood is received in ministering vessels in the north, and their blood requires four applications on the four corners [of the altar]. How was it done? He went up the ascent, turned to the surrounding walkway, and came to the south-east corner, then the north-east, then the north-west, and then the south-west. He would pour the residue of the blood out at the southern base. They were eaten within the hangings [of the Tabernacle], by male priests, prepared in any fashion, the same day and night, until midnight.

Five things [sacrifices] may come in uncleanness, but may not be eaten in uncleanness:the omer, the two loaves, the showbread, the sacrifices of the public peace-offerings, and the goats of new months. The pesah which comes in uncleanness is [also] eaten in uncleanness, for from the very beginning it came for no other purpose but to be eaten.