(א) וַיֵּ֥שֶׁב יִשְׂרָאֵ֖ל בַּשִּׁטִּ֑ים וַיָּ֣חֶל הָעָ֔ם לִזְנ֖וֹת אֶל־בְּנ֥וֹת מוֹאָֽב׃ (ב) וַתִּקְרֶ֣אןָ לָעָ֔ם לְזִבְחֵ֖י אֱלֹהֵיהֶ֑ן וַיֹּ֣אכַל הָעָ֔ם וַיִּֽשְׁתַּחֲו֖וּ לֵאלֹֽהֵיהֶֽן׃ (ג) וַיִּצָּ֥מֶד יִשְׂרָאֵ֖ל לְבַ֣עַל פְּע֑וֹר וַיִּֽחַר־אַ֥ף יְהֹוָ֖ה בְּיִשְׂרָאֵֽל׃ (ד) וַיֹּ֨אמֶר יְהֹוָ֜ה אֶל־מֹשֶׁ֗ה קַ֚ח אֶת־כׇּל־רָאשֵׁ֣י הָעָ֔ם וְהוֹקַ֥ע אוֹתָ֛ם לַיהֹוָ֖ה נֶ֣גֶד הַשָּׁ֑מֶשׁ וְיָשֹׁ֛ב חֲר֥וֹן אַף־יְהֹוָ֖ה מִיִּשְׂרָאֵֽל׃ (ה) וַיֹּ֣אמֶר מֹשֶׁ֔ה אֶל־שֹׁפְטֵ֖י יִשְׂרָאֵ֑ל הִרְגוּ֙ אִ֣ישׁ אֲנָשָׁ֔יו הַנִּצְמָדִ֖ים לְבַ֥עַל פְּעֽוֹר׃ (ו) וְהִנֵּ֡ה אִישׁ֩ מִבְּנֵ֨י יִשְׂרָאֵ֜ל בָּ֗א וַיַּקְרֵ֤ב אֶל־אֶחָיו֙ אֶת־הַמִּדְיָנִ֔ית לְעֵינֵ֣י מֹשֶׁ֔ה וּלְעֵינֵ֖י כׇּל־עֲדַ֣ת בְּנֵי־יִשְׂרָאֵ֑ל וְהֵ֣מָּה בֹכִ֔ים פֶּ֖תַח אֹ֥הֶל מוֹעֵֽד׃ (ז) וַיַּ֗רְא פִּֽינְחָס֙ בֶּן־אֶלְעָזָ֔ר בֶּֽן־אַהֲרֹ֖ן הַכֹּהֵ֑ן וַיָּ֙קׇם֙ מִתּ֣וֹךְ הָֽעֵדָ֔ה וַיִּקַּ֥ח רֹ֖מַח בְּיָדֽוֹ׃ (ח) וַ֠יָּבֹ֠א אַחַ֨ר אִֽישׁ־יִשְׂרָאֵ֜ל אֶל־הַקֻּבָּ֗ה וַיִּדְקֹר֙ אֶת־שְׁנֵיהֶ֔ם אֵ֚ת אִ֣ישׁ יִשְׂרָאֵ֔ל וְאֶת־הָאִשָּׁ֖ה אֶל־קֳבָתָ֑הּ וַתֵּֽעָצַר֙ הַמַּגֵּפָ֔ה מֵעַ֖ל בְּנֵ֥י יִשְׂרָאֵֽל׃
Pinchas, The Fanatic
Talmud Yerushalmi Sanhedrin 9:7
The Elders of Israel sought to excommunicate Pinhas until the Holy Spirit hurried and said: “It shall be for him and his descendants after him a covenant of priesthood for all time, because he took zealous action for his God, thus making expiation for the Israelites."
Torah Gems, v.3, Yavneh Publishing, 1998, p.144
When Moses saw how great Pinchas was, he was afraid that he would be chosen as the leader, but he was not pleased with the prospect of having such a zealot as the leader of the Jewish people. He therefore asked of God that the leader be a tolerant person, and not a zealous one.”
Numbers Rabbah 21:2
Moses requested of the Blessed Holy One at the hour of his death, saying before God: “Master of the Universe, the mind of each and every one is known before you, and none of them are the same as another’s. When I am separated from them [by death], I ask of you please to set someone over them who will be patient with each and every one according to their uniqueness…”
Pinchas, the Honorable
(א) וְלַמַּלְשִׁינִים אַל תְּהִי תִקְוָה וְכָל הָרִשְׁעָה כְּרֶֽגַע תֹּאבֵד וְכָל אֹיְבֶֽיךָ מְהֵרָה יִכָּרֵֽתוּ וְהַזֵּדִים מְהֵרָה תְעַקֵּר וּתְשַׁבֵּר וּתְמַגֵּר וְתַכְנִֽיעַ בִּמְהֵרָה בְיָמֵֽינוּ: בָּרוּךְ אַתָּה יְהֹוָה שׁוֹבֵר אֹיְ֒בִים וּמַכְנִֽיעַ זֵדִים:
(1) Let there be no hope for informers and may all wickedness instantly perish; may all the enemies of Your people be swiftly cut off, and may You quickly uproot, crush, rout and subdue the insolent, speedily in our days. Blessed are You, Adonoy, Crusher of enemies. and Subduer of the insolent.
Rabbi Kook, as quoted in Nechama Leibowitz' Studies in Bamidbar, p.330-1
Any sage distinguished for his piety and learning is capable of formulating prayers breathing sentiments of mercy and love. But such a prayer as this one, so full of hate and condemnation is bound to arouse the private feelings of animosity and spite, on the part of the author, against the enemies and persecutors of his people. Such a prayer must therefore originate with one noted for the holiness and purity of character and entire lack of the passion of hatred. Such a man was Samuel ha-katan. One could be sure that he was dominated by completely unselfish considerations and inspired by the purest of motives, and had removed from his heart all private feelings of hatred for the persecutors of his people"
Samson Rafael Hirsch
Phinehas acted meritoriously only because he punished the transgression in flagranto, in the act. Had he done it afterwards it would have been murder.
Sanhedrin 82a
Moreover, if Zimri son of Salu (see Numbers 25:1–9) had separated himself from the woman and only then Pinehas killed him, Pinehas would have been executed for killing him, because it is permitted for zealots to kill only while the transgressor is engaged in the act of intercourse. Furthermore, if Zimri would have turned and killed Pinehas in self-defense, he would not have been executed for killing him, as Pinehas was a pursuer. One is allowed to kill a pursuer in self-defense, provided that the pursued is not liable to be executed by the court.
Targum Jonathan on Numbers 25:13
Because Phinehas had taken the spear with his arm, prayed with his mouth and struck sinners in their innards, the Torah (Deut 18:3) provides that the priests receive the sacrificial gifts of shoulder, cheekbone, and maw.
(י) וַיְדַבֵּ֥ר יְהֹוָ֖ה אֶל־מֹשֶׁ֥ה לֵּאמֹֽר׃ (יא) פִּֽינְחָ֨ס בֶּן־אֶלְעָזָ֜ר בֶּן־אַהֲרֹ֣ן הַכֹּהֵ֗ן הֵשִׁ֤יב אֶת־חֲמָתִי֙ מֵעַ֣ל בְּנֵֽי־יִשְׂרָאֵ֔ל בְּקַנְא֥וֹ אֶת־קִנְאָתִ֖י בְּתוֹכָ֑ם וְלֹא־כִלִּ֥יתִי אֶת־בְּנֵֽי־יִשְׂרָאֵ֖ל בְּקִנְאָתִֽי׃ (יב) לָכֵ֖ן אֱמֹ֑ר הִנְנִ֨י נֹתֵ֥ן ל֛וֹ אֶת־בְּרִיתִ֖י שָׁלֽוֹם׃ (יג) וְהָ֤יְתָה לּוֹ֙ וּלְזַרְע֣וֹ אַחֲרָ֔יו בְּרִ֖ית כְּהֻנַּ֣ת עוֹלָ֑ם תַּ֗חַת אֲשֶׁ֤ר קִנֵּא֙ לֵֽאלֹהָ֔יו וַיְכַפֵּ֖ר עַל־בְּנֵ֥י יִשְׂרָאֵֽל׃ (יד) וְשֵׁם֩ אִ֨ישׁ יִשְׂרָאֵ֜ל הַמֻּכֶּ֗ה אֲשֶׁ֤ר הֻכָּה֙ אֶת־הַמִּדְיָנִ֔ית זִמְרִ֖י בֶּן־סָל֑וּא נְשִׂ֥יא בֵֽית־אָ֖ב לַשִּׁמְעֹנִֽי׃ (טו) וְשֵׁ֨ם הָֽאִשָּׁ֧ה הַמֻּכָּ֛ה הַמִּדְיָנִ֖ית כׇּזְבִּ֣י בַת־צ֑וּר רֹ֣אשׁ אֻמּ֥וֹת בֵּֽית־אָ֛ב בְּמִדְיָ֖ן הֽוּא׃ {פ}
(טז) וַיְדַבֵּ֥ר יְהֹוָ֖ה אֶל־מֹשֶׁ֥ה לֵּאמֹֽר׃ (יז) צָר֖וֹר אֶת־הַמִּדְיָנִ֑ים וְהִכִּיתֶ֖ם אוֹתָֽם׃ (יח) כִּ֣י צֹרְרִ֥ים הֵם֙ לָכֶ֔ם בְּנִכְלֵיהֶ֛ם אֲשֶׁר־נִכְּל֥וּ לָכֶ֖ם עַל־דְּבַר־פְּע֑וֹר וְעַל־דְּבַ֞ר כׇּזְבִּ֨י בַת־נְשִׂ֤יא מִדְיָן֙ אֲחֹתָ֔ם הַמֻּכָּ֥ה בְיוֹם־הַמַּגֵּפָ֖ה עַל־דְּבַר־פְּעֽוֹר׃
The Torah: A Modern Commentary, Revised p.1087
"The Torah states that the crown of God's favor was bestowed on Phinehas and that because he had shown himself zealous his descendants would inherit the priesthood forever. This presents the reader with the serious moral question of how such a priceless reward could be given for an act of killing... Phinehas is rewarded not so much for slaying the transgressors as for saving his people from God's destructive wrath... Phinehas's impulsive deed was not merely a kind of battlefield execution but reflected his apprehension that the demands of God needed human realization and required a memorable and dramatic example against permissiveness in the religious realm. The story further asserts that this was the proper way to halt further religious disintegration and to repair the breach of the covenant."
Numbers Rabbah 21:3
Why does the Torah note that Zimri was head of a clan? To teach that when one tarnishes one's reputation, the whole family is affected....
As a reward Phinehas received God's brit shalom, literally, covenant of peace. Great was this gift, for the world is maintained by peace-- and the Torah is peace itself, as it is said "All her paths are peace."
Naphtali Zvi Yehuda Berlin, as quoted in Nechama Leibowitz' Studies in Bamidbar, p.331
In reward for turning away the wrath of the Holy One blessed be He, He blessed him with the attribute of peace, that he should not be quick-tempered or angry. Since, it was only natural that such a deed as Phinehas' should leave in his heart an intense emotional unrest afterward, the Divine blessing was designed to cope with this situation and promised peace and tranquility of soul
Rav Yehudah said in the name of Shmuel: The verse (Numbers 25, 12) says, “And therefore say, behold I give to him my covenant of peace—shalom.” When he is shalem (whole/complete) and not when he is chaser (missing something/diminished). But hey, the Torah wrote “shalom”! Said Rav Nachman: The “vav” of shalom is (written) broken.
Babylonian Talmud, Tractate Zevachim 101b
Pinchas did not become a priest until he had made peace among the Tribes [i.e. between the Tribes of Reuven, Gad, and half of Menasheh, and the rest of Israel.
Iturei Torah
After the great zealousness that he acted upon for God, God gives him as a gift the Covenant of Shalom. It is as if the Torah is hinting that the path of Shalom is always preferable to, and more successful than, the path of zealousness and war.