ציטירנדיקער פּירוש אויף ויקרא 10:20

and he concedes to the truth: And even though he can uphold his words with claims that he [can produce]. And so did we find with Moshe when Aharon pushed him and said to him, "If you have heard [the law] with regards to temporary [sacrifices], you should not be lenient [with it] with regards to permanent sacrifices. "And Moshe heard and it was good in his eyes" (Leviticus 10:20). He conceded to him and he was not embarrassed [so as] to say, "I didn't hear [this]"; but rather [he said,] "I have heard [this] and I had forgotten [it]."

וַיֵּיטָב means HE DID GOOD TO THEM. — The following is the difference between certain forms in a word (verb) whose root is two letters when one prefixes ו and י to them: when it intends to express the meaning “and he caused someone or something to do a particular action” (i. e. the 3rd masc. sing, imperf. Hiphil with Vau conversive), the י has the vowel Tzéré which is what we call Kametz Katan, as, (in this verse) “And God dealt well (וַיֶּיטָב) with the midwives” (to Rashi the root it טב; we take it as יטב); (Lamentations 2:5) “וַיָרָב for the daughter of Judah [mourning]” i. e. He increased (made great) the mourning; (root רֹב; we take it as רבה). Similarly (II Chronicles 36:20) “וַיָּגָל the remnant” which occurs in connection with Nebuzaradon, i. e. he caused the remnant to be exiled; (Judges 15:4) וַיָּפָן tail to tail”, i. e. he turned the tails one towards the other (more lit., he caused one tail to turn to the other) — all these express the meaning “he caused others to do something” (i. e. they are of the Hiphil conjugation). When, however, it speaks in the sense of “and he did something” (3rd masc. sing, imperf. Kal with Vau conv.), the י has the vowel Chirik. For example, (Leviticus 10:20) “וַיִיטַב in his eyes” — this means, “it was good”. Similarly (in this verse) the people”, i. e. the people became many; (2 Kings 25:21) “וַיִגָל Judah”, i. e. Judah became an exile; (2:12) “וַיִפֵן this way and that way”, i. e. he turned this way and that way. Do not answer me (do not raise an objection) by quoting the words וַיֵּלֶךְ and וַיֵּשֶׁב and וַיַרֶד and וַיֵּצֵא (saying that these verbal forms also have ו and י prefixed and the י has the vowel Tzéré and yet they are Kal, not Hiphil forms), because these are not of the same class of verbs as those above-mentioned, for the י is part of the root in them — in יֵלֵךְ and יֵשֵׁב and יֵרֵד and יֵצֵא, the י is a third root letter in each of these.

ויאמר אלעזר הכהן וגו׳ AND ELEAZAR THE PRIEST SAID etc. — Because Moses fell into anger (Numbers 31:14) he fell into error: there escaped him the laws concerning the removal of uncleanness absorbed by vessels which have contained the food of heathens. This, too, do you find was the case on the eighth day of the installing of the priests, as it is said, (Leviticus 10:16) “And Moses was angry with Eleazar and Ithamar”, — he fell into anger, he fell into error (cf. 10:16 that he made an error regarding the שעיר החטאת which Aaron refused to eat). Similarly, also, when he said, (Numbers 20:10, Numbers 20:11) “Hear, now, ye rebels”, … “he smote the rock”; it was through his anger that he made the mistake (Sifrei Bamidbar 157:9; cf. Pesachim 66b).