וַיֹּ֣אמֶר לִ֔י הִנָּ֥ךְ הָרָ֖ה וְיֹלַ֣דְתְּ בֵּ֑ן וְעַתָּ֞ה אַל־תִּשְׁתִּ֣י ׀ יַ֣יִן וְשֵׁכָ֗ר וְאַל־תֹּֽאכְלִי֙ כָּל־טֻמְאָ֔ה כִּֽי־נְזִ֤יר אֱלֹהִים֙ יִהְיֶ֣ה הַנַּ֔עַר מִן־הַבֶּ֖טֶן עַד־י֥וֹם מוֹתֽוֹ׃ (פ)
Ngunit sinabi niya sa akin: ‹Narito, ikaw ay maglilihi at manganganak ng isang lalaki; kaya ngayon, huwag kang iinom ng alak o ng anumang inuming nakalalasing, at huwag kang kakain ng anumang bagay na marumi, sapagkat ang bata ay magiging nazir ng Diyos mula pa sa sinapupunan hanggang sa araw ng kanyang kamatayan.›”
Rashi
Do not consume anything ritually defiled. Anything prohibited to the Nazirite.2Sotah, 9:b. This includes grape extract, in addition to wine. (Rashi, there).