Commentary for Judges 13:5

כִּי֩ הִנָּ֨ךְ הָרָ֜ה וְיֹלַ֣דְתְּ בֵּ֗ן וּמוֹרָה֙ לֹא־יַעֲלֶ֣ה עַל־רֹאשׁ֔וֹ כִּֽי־נְזִ֧יר אֱלֹהִ֛ים יִהְיֶ֥ה הַנַּ֖עַר מִן־הַבָּ֑טֶן וְה֗וּא יָחֵ֛ל לְהוֹשִׁ֥יעַ אֶת־יִשְׂרָאֵ֖ל מִיַּ֥ד פְּלִשְׁתִּֽים׃

For, lo, thou shalt conceive, and bear a son; and no razor shall come upon his head; for the child shall be a Nazirite unto God from the womb; and he shall begin to save Israel out of the hand of the Philistines.’

Rashi on Judges