Mishnayos Beitzah Perek 5 Mishnah 5

A coal that one borrowed from another on the Festival is as the feet of the owner, and it may be carried on the Festival to any place where its owner may walk. Since it has substance, it is associated with its owner. But a flame that one lit from another’s flame may be taken anywhere, as it has no substance. This essential difference between a coal and a flame has additional halakhic ramifications: If one uses a coal of consecrated property for a non-consecrated purpose, he is liable for misuse of consecrated property, since it has substance. But if one uses a consecrated flame, although according to rabbinic law one may not derive benefit from it ab initio, if one did benefit from it, he is not liable for misuse, since it does not have substance. Similarly, one who takes out a coal from a private domain to the public domain on Shabbat is liable for the prohibited labor of carrying, but one who takes out a flame is exempt. With regard to a cistern of an individual, water drawn from it is as the feet of the individual who owns the cistern, and the water may be carried only to those places where its owner is permitted to walk. And water drawn from a cistern belonging jointly to all the people dwelling in a particular town is as the feet of the people of that town. And water drawn from a cistern of those who come up to Eretz Yisrael from Babylonia, i.e., a public cistern, is as the feet of whoever fills his vessel with its water; the water has no defined boundary of its own since it is made available to all.

הַגַּחֶלֶת כְּרַגְלֵי הַבְּעָלִים, וְשַׁלְהֶבֶת בְּכָל מָקוֹם. גַּחֶלֶת שֶׁל הֶקְדֵּשׁ מוֹעֲלִין בָּהּ, וְשַׁלְהֶבֶת לֹא נֶהֱנִין וְלֹא מוֹעֲלִין. הַמּוֹצִיא גַחֶלֶת לִרְשׁוּת הָרַבִּים, חַיָּב. וְשַׁלְהֶבֶת, פָּטוּר. בּוֹר שֶׁל יָחִיד, כְּרַגְלֵי הַיָּחִיד. וְשֶׁל אַנְשֵׁי אוֹתָהּ הָעִיר, כְּרַגְלֵי אַנְשֵׁי אוֹתָהּ הָעִיר. וְשֶׁל עוֹלֵי בָבֶל, כְּרַגְלֵי הַמְמַלֵּא: