דַּבֵּר֙ אֶל־בְּנֵ֣י יִשְׂרָאֵ֔ל וְאָמַרְתָּ֖ אֲלֵהֶ֑ם אִ֣ישׁ אֽוֹ־אִשָּׁ֗ה כִּ֤י יַפְלִא֙ לִנְדֹּר֙ נֶ֣דֶר נָזִ֔יר לְהַזִּ֖יר לַֽיהוָֽה׃
Speak unto the children of Israel, and say unto them: When either man or woman shall clearly utter a vow, the vow of a Nazirite, to consecrate himself unto the LORD,
Read kabbalistic (mystical) interpretation of Numbers 6:2: and classical mystical sources.