Parashas Naso
מִיַּ֤יִן וְשֵׁכָר֙ יַזִּ֔יר חֹ֥מֶץ יַ֛יִן וְחֹ֥מֶץ שֵׁכָ֖ר לֹ֣א יִשְׁתֶּ֑ה וְכׇל־מִשְׁרַ֤ת עֲנָבִים֙ לֹ֣א יִשְׁתֶּ֔ה וַעֲנָבִ֛ים לַחִ֥ים וִיבֵשִׁ֖ים לֹ֥א יֹאכֵֽל׃
they shall abstain from wine and any other intoxicant; they shall not drink vinegar of wine or of any other intoxicant, neither shall they drink anything in which grapes have been steeped, nor eat grapes fresh or dried.
Torah Temimah points to TT / Nazir (verified).
מיין ושכר — נאמר כאן שכר ונאמר להלן שכר, מה להלן רביעית אף כאן רביעית.
English: “From wine and strong drink” — “shechar” is said here and “shechar” is said elsewhere; just as there it is a revi’is, so here it is a revi’is.
Custom
Chazal establish the measure of a revi’is as the threshold for the nazir’s wine prohibition.