Reference for Nedarim 3:7

הַנּוֹדֵר מֵרוֹאֵי הַחַמָּה, אָסוּר אַף בַּסּוּמִין, שֶׁלֹּא נִתְכַּוֵּן זֶה אֶלָּא לְמִי שֶׁהַחַמָּה רוֹאָה אוֹתוֹ:

If one bevows himself from "the seers of the sun," he is forbidden to the blind, too. For he intended only "those seen by the sun." [not having said: "from the seeing."]

Jastrow