Reference for Nazir 1:2
הֲרֵינִי נָזִיר מִן הַחַרְצַנִּים, וּמִן הַזַּגִּים, וּמִן הַתִּגְלַחַת, וּמִן הַטֻּמְאָה, הֲרֵי זֶה נָזִיר וְכָל דִּקְדּוּקֵי נְזִירוּת עָלָיו. הֲרֵינִי כְשִׁמְשׁוֹן, כְּבֶן מָנוֹחַ, כְּבַעַל דְּלִילָה, כְּמִי שֶׁעָקַר דַּלְתוֹת עַזָּה, כְּמִי שֶׁנִּקְּרוּ פְלִשְׁתִּים אֶת עֵינָיו, הֲרֵי זֶה נְזִיר שִׁמְשׁוֹן. מַה בֵּין נְזִיר עוֹלָם לִנְזִיר שִׁמְשׁוֹן. נְזִיר עוֹלָם, הִכְבִּיד שְׂעָרוֹ, מֵקֵל בְּתַעַר וּמֵבִיא שָׁלשׁ בְּהֵמוֹת. וְאִם נִטְמָא, מֵבִיא קָרְבַּן טֻמְאָה. נְזִיר שִׁמְשׁוֹן, הִכְבִּיד שְׂעָרוֹ, אֵינוֹ מֵקֵל. וְאִם נִטְמָא, אֵינוֹ מֵבִיא קָרְבַּן טֻמְאָה:
(If one said:) "I shall be a Nazirite from chartzanim" (kernels of grapes)l "from zagim" (husks of grapes), "from shaving," or "from uncleanliness," he becomes a Nazirite and all the details of Naziritism apply to him. [If he mentions any one of these, he becomes a Nazirite, as if he had said: "I shall be a Nazirite," unqualified. And because it is taught at the end of the Mishnah that not all the details of Naziritism apply to a perpetual Nazirite (Nazir olam) and a Shimshon Nazirite, it is taught here that all the details of Naziritism apply to him.] (If one said:) "I shall be like Shimshon," like the son of Manoach," "like the husband of Delilah," "like the one who uprooted the doors of Azzah," "like the one whose eyes were gouged out by the Philistines," he becomes a Shimshon Nazirite. What is the difference between a perpetual Nazirite and a Shimshon Nazirite? [Our Mishnah is "lacking," and this is what is meant: "And if he vowed to become a perpetual Nazirite, he becomes a perpetual Nazirite. And what is the difference between a perpetual Nazirite and a Shimshon Nazirite?"] A perpetual Nazirite — if his hair grows heavy, he can lighten it with a razor [every twelve months. This is derived from (the instance of) Avshalom, who was a perpetual Nazirite, and concerning whom it is written (II Samuel 14;26)): "And it was at the end of yamim, to the yamim that he would shave; for it became heavy upon him and he would shave it," and it is written elsewhere (Leviticus 25:29): "yamim" (in context: "a year of days") shall be its redemption."] and he brings three beasts (on the day that he shaves it). And if he becomes unclean, he brings an offering (to atone) for his uncleanliness. A Shimshon Nazirite — if his hair grows heavy, he may not lighten it, and if he becomes unclean, he does not bring an offering for is uncleanliness. [And he may become unclean even ab initio, for Shimshon would become unclean by (contact with dead bodies), this serving as the source (for the halachah). As to our learning: "if he becomes unclean," which implies "after the fact," but not ab initio — Because it was taught in the first part of the Mishnah in respect to a perpetual Nazirite: "and if he becomes unclean," it is also taught at the end, in respect to a Shimshon Nazirite: "and if he becomes unclean."]