Mishnayos Bava Kamma Perek 6 Mishnah 6

In the case of a spark that emerged from under the hammer of a blacksmith and started a fire, causing damage, the blacksmith is liable for the damage caused. In the case of a camel that was laden with flax and was passing through the public domain, and its flax extended into a store and the flax caught fire from a lamp in the store belonging to the storekeeper, and as a result of the burning flax the camel set fire to the building together with all its contents, the owner of the camel is liable. But if the storekeeper placed his lamp outside, thereby causing the flax on the camel to catch fire, and consequently the building was set on fire, the storekeeper is liable. Rabbi Yehuda says: In a case where the lamp placed outside was a Hanukkah lamp, the storekeeper is exempt, since it is a mitzva for a Hanukkah lamp to be placed outside.

גֵּץ שֶׁיָּצָא מִתַּחַת הַפַּטִּישׁ וְהִזִּיק, חַיָּב. גָּמָל שֶׁהָיָה טָעוּן פִּשְׁתָּן וְעָבַר בִּרְשׁוּת הָרַבִּים, וְנִכְנַס פִּשְׁתָּנוֹ לְתוֹךְ הַחֲנוּת, וְדָלְקוּ בְּנֵרוֹ שֶׁל חֶנְוָנִי וְהִדְלִיק אֶת הַבִּירָה, בַּעַל הַגָּמָל חַיָּב. הִנִּיחַ חֶנְוָנִי נֵרוֹ מִבַּחוּץ, הַחֶנְוָנִי חַיָּב. רַבִּי יְהוּדָה אוֹמֵר, בְּנֵר חֲנֻכָּה פָּטוּר: