Midrash su Levitico 23:19

6) (Vayikra 23:19) ("And you shall offer one kid of the goats as a sin-offering and two one-year old lambs as a sacrifice of peace-offerings.") "And you shall offer one kid of the goats as a sin-offering": I might think that the seven lambs and the kid of the goats mentioned in Bamidbar (Bamidbar 28:27, Bamidbar 28:29) are the same as those mentioned here. But when you come to bullocks and rams, you find that they are not so. (For here it is written "one year bullock and two rams," and there (Bamidbar 28:27) "two young bullocks" and "one ram.") But these are sacrificed because of the bread, and the others, because of the (festival) day.

7) "and two one-year old lambs as a sacrifice of peace-offerings": They must be sacrificed expressly as peace-offerings. "and the one-year old lambs as a sacrifice of peace-offerings": R. Shimon said: For what do the two Shavuoth lambs atone? For defilement of the sanctuary and its holy things. If the first atoned, why was the second needed? — For defilement that may have occurred between the (sprinkling of the blood of the) first and the (sacrifice of the) second. — If so, Israel would have to sacrifice every moment! (True,) but the Torah was "solicitous" of Israel.

(Numb. 4:18:) “Do not cut off.” This text is related (to Ps. 33:18), “Behold, the eye of the Lord is on those who fear Him….” The text speaks along many lines of thought.¹²¹Shittim. For this use of the word, Buber, n. 209, cites Lev. R. 34:8. For the other interpretations, see above, Gen. 6:5. For what we need, however, it is speaking about the tribe of Levi.¹²²Numb. R. 5:1. And where is it shown? Where the tribe of Levi is called those who fear the Lord, as stated (in Mal. 2:5), “and I gave them (i.e., life and peace) as well as fear, and he feared Me.” (Ps. 33:19) “On those who wait for His steadfast love,” because they are always waiting for the name of the Holy One, blessed be He. (Ps. 33:19:) “To deliver their soul from death and to keep them alive in famine,” through the twenty-four gifts which the Holy One, blessed be He, has given them.¹²³THal. 2:7-9; BQ 110b (bar.); Hul. 133b (bar.); cf. Hal. 4:9. These are them: ten in the sanctuary, ten within the borders, and four in Jerusalem. The ten in the sanctuary: the sin offering (Lev. 6:17-23; Zev. 5:3), the guilt offering (Lev. 5:14-16, 20-26; 19:20-22; Zev. 5:5), the peace sacrifices and the community peace sacrifices (Lev. 23:19-20; Zev. 5:5), the sin offering of a fowl (Lev. 5:8), the guilt offering for a doubtful sin (Lev. 5:17-19; Zev. 5:5), the leper's log of oil (Lev. 14:12), the two loaves (Lev. 23:17), the shewbread (Exod. 25:30; Lev. 24:5-9), the remnant of the omer (Lev. 23:10-12; Men. 10:4), and the remainder of the meal offering (Lev. 2:3).
The ten within the borders: the terumah (Numb. 18:12), the terumah of the tithe (Numb. 18:25-29), the hallah (Numb. 15:18-21), the first of the shorn wool (Deut. 18:4), the shoulder, the cheeks, and the stomach (Deut. 18:3), the redemption of the [first-born] son (Numb. 18:15-16), [the redemption of] a firstling ass (Exod. 13:13), [the payment for] the robbery of a proselyte (Thal. 2:9; Bq 110b; Hul. 133b), things consecrated (Numb. 18:14; Bik. 3:12), and a field of possession (Lev. 27:16-21)
The four in Jerusalem: the firstlings [of animals] (Numb. 18:17-18), the first fruits (Exod. 23:19; Numb. 18:13; Hal. 4:9), the priest's share from the thank-offering ram and from the nazarite ram, the breast of the peace offerings, and the thigh (Exod. 29:27-28; Lev. 7:12-14; 31-34; 10:14-15; Numb. 6:13-20; 18:18), and skins of [burnt, sin, and guilt] offerings (Lev. 7:8; Zev. 12:3)
Behold, these are twenty-four gifts. Ergo (in Ps. 33:19), “and to keep them alive in famine. (Numb. 4:18) “Do not cut off [the tribe of the Kohathite families from the Levites].” The Holy One, blessed be He, foresaw that Korah was going to arise and disagree about the priesthood.¹²⁴Cf. Numb. R. 5:5. The Holy One, blessed be He, said. “I will not destroy the Levites because of Korah.” (Numb. 4:18:) “Do not cut off [the tribe of the Kohathite families from the Levites].” This text is related (to Is. 48:9), “For the sake of My name I will delay My anger, and for My praise I will hold back for you so as not to cut you off.” To what is the matter comparable?¹²⁵Numb. R. 5:6. To a king who had a son that was associated with bandits;¹²⁶Gk.: lestai. and when they were captured, his son was captured with them. The king said, “What shall I do? Shall I execute the robbers? Possibly my son is with them. Instead, for the sake of my son, I will exonerate them for now.” Similarly, the Levites carried the tabernacle. Thus it is stated (in Numb. 7:9), “But to the Children of Kohath he gave no [wagons], because they had the service of the holy.” When the Holy One, blessed be He, saw that Korah and his assembly were going to be opposed to Moses and Aaron, the Holy One, blessed be He, said, “What shall I do with these? To kill them in the desert is not possible.” Why? Because the Holy One, blessed be He, had taken half of His name and bestowed it upon them, the yh (of yhwh) in the Kohathite (hqhty in Numb. 4:18).¹²⁷Numb. R. 5:6, and Yalqut Shim‘oni, Is. 48:9, 326 (466) add that the letters from the divine name appear at the end and the beginning of HQHTY, and Numb. R. explains further that the Holy One added the definite article (H) to the name, Kohathite, for this very reason. It therefore says (in Is. 48:9), “For the sake of My name I will delay¹²⁸Literally: LENGTHEN. This verb may have suggested that the Holy One deliberately lengthened the name, Kohathite, with the addition of the article. My anger….”