Nedarim3: 10
הַנּוֹדֵר מִ,,שּׁוֹבְתֵי שַׁבָּת” — אָסוּר בְּיִשְׂרָאֵל וְאָסוּר בַּכּוּתִים; מֵ,,אוֹכְלֵי שׁוּם” — אָסוּר בְּיִשְׂרָאֵל וְאָסוּר בַּכּוּתִים; מֵ,,עוֹלֵי יְרוּשָׁלַיִם” אָסוּר בְּיִשְׂרָאֵל, וּמֻתָּר בַּכּוּתִים.
One who makes a neder prohibiting “those who rest on the Sabbath” is forbidden to [benefit from] Jews and forbidden to [benefit from] Cutheans; [if] “those who eat garlic” —- he is forbidden to [benefit from] Jews and forbidden to [benefit from] Cutheans; [if] “the pilgrims to Jerusalem” —- he is forbidden to [benefit from] Jews, but permitted to [benefit from] Cutheans.