Rashi on Numbers 16:15/רש"י על במדבר ט״ז:ט״ו

1ויחר למשה מאד AND MOSES WAS VERY DISTRESSED — i.e. he was very much grieved.

2אל תפן אל מנחתם TURN NOT THOU TO THEIR OBLATION — According to its plain sense the meaning is: “In respect to the frankincense which they will offer before Thee tomorrow, I beg of Thee do not turn (pay regard) to them”. The Midrashic explanation is: He said, “I know that they have a portion in the continual offerings of the community; let not even this their portion be accepted favourably before Thee — let the fire leave it alone and not consume it” (Midrash Tanchuma, Korach 7).

3לא חמור אחד מהם נשאתי means, I have not taken the ass of any one of them; — even when I went from Midian to Egypt and placed my wife and my sons on the ass (Exodus 4:20), and I surely ought afterwards to have taken the price of that ass from their money, yet I took it only from my own (Midrash Tanchuma, Korach 7). The translation given by Onkelos of the word נשאתי is שחרית: in the Aramaic language a forced levy made by the king is so called, viz., שחרור (cf. Rashi on Bava Batra 47a. The translation of Onkelos therefore is: I did not press into my service the ass of any one of them).