민수기 7:5의 Musar

קח מאתם …. ונתת אותם אל הלוים . Why are the Levites suddenly mentioned here again in 7,5,? At this point the Levites had not yet been chosen. They had only been chosen after the Israelites had been counted, and that count had not taken place until the first day of lyar. Only then had G–d said: "Do not count the tribe of Levi with the other tribes," and had said that they would be counted separately. The offerings that the Princes brought had been brought a month earlier, on the first day of Nissan. The fact is that G–d had already then given Moses an indication that in the future He would appoint the Levites to perform the Service involving the Tabernacle. This is similar to what we read in Parshat Tetzaveh, where the Torah speaks about Aaron lighting the candelabrum, the kind of oil to be used, etc., and the Torah says: "Bring close Aaron your brother and his sons from the midst of the children of Israel, etc." (Exodus 28,1). Rashi explains there that the appointment of Aaron and his sons, and his daily duties, etc., did not become a commandment until after the completion of the building of the tabernacle, though the Torah wrote it in this connection. Actually we find the commandment as such only at the end of Parshat Emor at the beginning of chapter 24. Nonetheless G–d had informed Moses much earlier of what was to become a commandment at a later stage, so that preparations could be made. We find the same thing regarding the appointment of the Levites.