Nombres 25:11

Pinchas the son of Elozor, the son of Aharon the kohein. Because the tri es disparaged him, [saying] ‘Have you seen that son of “Puti,” whose mother’s father fattened calves for idol worship, and who murdered the chieftain of a tribe of Israel?’ Therefore, Scripture traces his lineage to Aharon.

By his vengeance for Me. By avenging My vengeance — by his rage where I should have been enraged. קִנְאָה always denotes someone enflamed to avenge something. Enportment, “flaming anger,” in Old French.

Phinehas the zealous, the son of Elazar bar Aharon, the priest, hath turned away mine anger from the children of Israel, in that, when zealous with My zeal, he hath slain the sinners who were among them; and for his sake I have not destroyed the children of Israel in My indignation.

PHINEHAS, THE SON OF ELEAZAR. The Holy One, blessed be He, [here] informed Moses that He would give Phinehas a good reward for his zeal, because he was zealous for his G-d, and for the righteousness [Phinehas] for righteousness. which he did for Israel by bringing about atonement for them, so that they did not all die in the plague. He [also] commanded Moses to tell Israel that he [Phinehas] would be a priest forever, and this is the sense of the phrase, Therefore say, …] was G-d’s communication exclusively to Moses, telling him that He is desirous of rewarding Phinehas for the reasons stated in that verse, but He did not tell him what was to constitute the reward. Verse 12 then continues with the thought: “Since it is My desire to reward Phinehas, Therefore say to the children of Israel … ” Thus the contents of Verse 11 was not to be told to Israel (Aboab). This interpretation of Ramban is unlike that of Rashi from whose words it may be implied that even the contents of Verse 11 was to be told to the people, the object being that they were not to speak disparagingly of Phinehas for having killed a prince of Israel, for G-d testified that he is a descendant of Aaron, who was a lover of peace, and what Phinehas did was to save the honor of Israel. that Moses was to tell this to Israel. Now Scripture does not say: “and it shall be unto him, and to his seed after him ‘an everlasting priesthood, ’” as He said about Aaron,. but instead it says: ‘the covenant’ of an everlasting priesthood, and it [also] says, I give unto him ‘My covenant’ of peace, meaning that He will give him a covenant with peace cleaving to it, whereas in the case of Aaron it says for splendor and for beauty. and tiphereth, which represent certain Emanations], it was not necessary to mention ‘the covenant of’ an everlasting priesthood, indicating the perfect Unity. But in the case of Phinehas it does not say that his priesthood was for splendor and for beauty; therefore the verse had to mention ‘the covenant of an everlasting priesthood, indicating that Phinehas’ priesthood was also in the perfect Unity, because he was zealous for his G-d (Abusaula). See also my Hebrew commentary, p. 305. Therefore it says [here concerning Phinehas]: because he was zealous for his G-d. The student learned [in the mysteries of the Cabala] will understand.
Scripture mentions, Now the name of the man of Israel that was slain; And the name of the Midianite woman that was slain, in order to indicate that [Phinehas] deserved this great reward because he killed a prince of Israel, and the daughter of a heathen king and [nonetheless] he feared them not in his zeal for his G-d. And after He had requited His good reward to the righteous one [Phinehas], He commanded Moses to punish the wicked ones, and He told him, Harass the Midianites, but first He commanded him to count the people. This is the intent of [the phrase] And it came to pass after the plague [that the Eternal spoke unto Moses … ‘Take the sum etc.’], meaning that the taking of the census should be done first [before the punishment of the Midianites].

בקנאו את קנאתו בתוכם, for having taken G’d’s vengeance in the presence of all the people, so that by their watching what he did and not protesting his deed they would qualify for atonement of their sin for not having protested the sinners at the time when they were about to commit their evil deeds. [compare author on verse 4 in this chapter where he made a similar point explaining the unusual command by G’d to Moses. Ed.]

'פינחס בן אלעזר הכהן וגו, “Pinchas son of the High Priest Eleazar, etc.” although this was not news to anyone, the Torah had to repeat his genealogy so that the reader would not think that he could be hated for having taken the law into his own hands by killing Zimri. On the contrary, by doing so he had succeeded in arresting the vengeance G–d was in the process of taking from the sinners. Had he not done so, the people criticising him might themselves have been killed by the plague G–d had sent.