Reference for Nedarim 7:5
הַנּוֹדֵר מִן הַמִּטָּה, מֻתָּר בְּדַרְגָּשׁ, דִּבְרֵי רַבִּי מֵאִיר. וַחֲכָמִים אוֹמְרִים, דַּרְגָּשׁ בִּכְלָל מִטָּה. הַנּוֹדֵר מִן הַדַּרְגָּשׁ, מֻתָּר בְּמִטָּה. הַנּוֹדֵר מִן הָעִיר, מֻתָּר לִכָּנֵס לִתְחוּמָהּ שֶׁל עִיר, וְאָסוּר לִכָּנֵס לְעִבּוּרָהּ. אֲבָל הַנּוֹדֵר מִן הַבַּיִת, אָסוּר מִן הָאֲגַף וְלִפְנִים:
If one bevows himself from a bed, he is permitted (to sleep) on a dargesh [a small bed placed in front of a big bed, by which to mount it.] These are the words of R. Meir. And the sages say: "dargesh" is included in "bed." If one bevows himself from a dargesh, he is permitted (to sleep) in a bed. If one bevows himself from a city, he is permitted to enter the t'chum (Sabbath boundary) of the city [two thousand cubits on every side roundabout], and he is forbidden to enter its ibbur (the outskirts) [the houses that project from it seventy cubits and "a remnant" (until eighty), as a woman who is pregnant (me'ubereth), whose stomach projects outwards.] But one who bevows himself from a house is forbidden from the agaf ["the closing of the door"] and inwards [as in (Nechemiah 7:3): "yagifu (Let them close) the doors and bar them." The halachah is not in accordance with R. Meir in all of our Mishnah.]