Num 6:18

וְגִלַּ֣ח הַנָּזִ֗יר פֶּ֛תַח אֹ֥הֶל מוֹעֵ֖ד אֶת־רֹ֣אשׁ נִזְר֑וֹ וְלָקַ֗ח אֶת־שְׂעַר֙ רֹ֣אשׁ נִזְר֔וֹ וְנָתַן֙ עַל־הָאֵ֔שׁ אֲשֶׁר־תַּ֖חַת זֶ֥בַח הַשְּׁלָמִֽים׃

Then at the entrance to the Tent of Meeting, the Nazirite is to shave his consecrated head, take the hair, and put it on the fire under the peace offering.