Talmud for Nazir 6:10
גִּלַּח עַל הַזֶּבַח וְנִמְצָא פָסוּל, תִּגְלַחְתּוֹ פְסוּלָה, וּזְבָחָיו לֹא עָלוּ לוֹ. גִּלַּח עַל הַחַטָּאת שֶׁלֹּא לִשְׁמָהּ וְאַחַר כָּךְ הֵבִיא קָרְבְּנוֹתָיו לִשְׁמָן, תִּגְלַחְתּוֹ פְסוּלָה, וּזְבָחָיו לֹא עָלוּ לוֹ. גִּלַּח עַל הָעוֹלָה אוֹ עַל הַשְּׁלָמִים שֶׁלֹּא לִשְׁמָן וְאַחַר כָּךְ הֵבִיא קָרְבְּנוֹתָיו לִשְׁמָן, תִּגְלַחְתּוֹ פְסוּלָה, וּזְבָחָיו לֹא עָלוּ לוֹ. רַבִּי שִׁמְעוֹן אוֹמֵר, אוֹתוֹ הַזֶּבַח לֹא עָלָה לוֹ, אֲבָל שְׁאָר זְבָחִים עָלוּ לוֹ. וְאִם גִּלַּח עַל שְׁלָשְׁתָּן וְנִמְצָא אֶחָד מֵהֶן כָּשֵׁר, תִּגְלַחְתּוֹ כְשֵׁרָה, וְיָבִיא שְׁאָר הַזְּבָחִים:
If he shaved over the offering, and it were found to be unfit [as when its blood spilt, or it left (its precincts), or it became unclean], his shaving is void [Since the offering over which he shaved became unfit, it is as if bandits shaved him, concerning which we learned above that according to R. Eliezer it offsets seven days, and, according to the rabbis, thirty.], and his offerings are not credited to him [(the other offerings, that he sacrificed after his invalid shaving.) For since he must offset (the Naziritism) until his hair grows back, it is as if he sacrificed them before their time.] If he shaved over a sin-offering [(the "offering," above)], not (offered up) for its sake (lo lishmah), [and it were found to be unfit, (for a sin-offering not for its sake is unfit.) (Since we must be apprised of the difference between R. Shimon and the rabbis in respect to burnt-offering and peace-offering, "sin-offering," too, is taught)], and then he brought his offerings for their sakes, his shaving is void, and his offerings are not credited to him. If he shaved over the burnt-offering or over the peace-offering not for their sake, and then he brought his offerings for their sakes, his shaving is void and his offerings are not credited to him. [For since they are not credited as the peace-offering and the burnt-offering of a Nazirite, it is as if shaved over a gift burnt-offering or a gift peace-offering.] R. Shimon says: That offering (not for its sake) is not credited to him, but the other offerings are credited to him. [R. Shimon holds that if he shaves over a gift burnt-offering or peace-offering he satisfied the (shaving) requirement. The halachah is not in accordance with R. Shimon.] And if he shaved over the three [after all of them were sacrificed], and one of them were found to be fit (kasher) and the others, unfit, his shaving is valid [according to all, viz. (6:7): "And if he shaved over (any) one of the three, he has satisfied the requirement."], and he brings the other offerings.