Why does the Torah need to inform us that Aharon and his sons did everything that Hashem commanded Moshe?
Rashi: To teach us their praise in that they did not deviate one iota from all that Moshe had instructed them. 1
See Sifsei Chachamim, who lists the many places where the Torah writes this phrase and explains why it does not do so in connection with the Korban Pesach. See Beha'aloscha Bamidbar, 9:5.
?AsherTzivah Hashem be?Yad Moshe?. Why does the Torah deviate from the usual expression "Ka'asher Tzivah Hashem es Moshe"?
Ramban and Moshav Zekenim: Because they did not just do what Hashem commanded, but added to it, by bringing 'a strange fire' - which Hashem did not command them to bring. 1
Oznayim la'Torah: Because had the Torah written "Ka'asher Tzivah Hashem es Moshe" we would have thought that Aharon and his sons carried out everything that Hashem commanded Moshe ? even those things that were for Moshe to perform. 2
As we will see below (10:1).
