Talmud for Bava Batra 6:7
מִי שֶׁהָיְתָה דֶרֶךְ הָרַבִּים עוֹבֶרֶת בְּתוֹךְ שָׂדֵהוּ, נְטָלָהּ וְנָתַן לָהֶם מִן הַצַּד, מַה שֶּׁנָּתַן נָתַן, וְשֶׁלּוֹ לֹא הִגִּיעוֹ. דֶּרֶךְ הַיָּחִיד, אַרְבַּע אַמּוֹת. דֶּרֶךְ הָרַבִּים, שֵׁשׁ עֶשְׂרֵה אַמָּה. דֶּרֶךְ הַמֶּלֶךְ, אֵין לָהּ שִׁעוּר. דֶּרֶךְ הַקֶּבֶר, אֵין לָהּ שִׁעוּר. הַמַּעֲמָד, דַּיָּנֵי צִפּוֹרִי אָמְרוּ, בֵּית אַרְבַּעַת קַבִּין:
If a public path [i.e., one always used by the public] passed through one's field — If he took it and gave them one on the side, what he gave is given and (what he took) for himself does not revert to him. [And the public (now) has two paths, it being ruled: "A path held by the public may not be subverted."] A private path is four cubits. [i.e., If one sells his neighbor a path in the midst of his field, he must give him (at least) four cubits. A public path is sixteen cubits. The king's path has no limits. [For a king may "breach fences" before him to make a way for himself.] The path [on which one is carried] to the grave has no limits. [This is a rabbinic ordinance of respect for the dead. Not that those accompanying the body may "breach fences," as a king may, but they may pass over sown ground and need not detour to the side.] (If one sells his neighbor) a ma'amad (site), the judges of Sepphoris say: (He must give him at least an area of four kabin [i.e., thirty-three cubits and two handbreadths in width by fifty cubits in length. In the place of the ma'amad (lit., "standing"), they would execute seven standings and seven sittings when they returned from burying the dead, corresponding to the seven "Vanities" in the beginning of the book of Koheleth.]