Shabbat 44A

אי לא שרית ליה, אתי לכבויי. אמר רבי יהודה בן שילא אמר רב אסי אמר רבי יוחנן: הלכה כרבי יהודה בן לקיש במת.

if you do not permit him to move the corpse in an atypical manner, he will come to extinguish the fire. The rabbis permitted performing an act prohibited by rabbinic law so that one will not come to transgress a Torah prohibition. R' Yehuda ben Sheila said that Rav Asi said that R' Yoḥanan said: The halakha is in accordance with the opinion of R' Yehuda ben Lakish with regard to the issue of rescuing a corpse from a fire.

אין ניאותין הימנו, לפי שאינו מן המוכן. תנו רבנן: מותר השמן שבנר ושבקערה אסור. ורבי שמעון מתיר.

We learned in the Mishnah that one may not make use of the oil that drips from the candle on Shabbat because it is not among the oil prepared from Friday for use on Shabbat. With regard to this same issue, A baraita states: The remaining oil that is in the lamp or in a bowl in which a wick was burning is prohibited for use on Shabbat. However, R' Shimon permits using the remaining oil as, according to his opinion, there is virtually nothing prohibited due to the prohibition of set-aside.

מתני׳ מטלטלין נר חדש אבל לא ישן. רבי שמעון אומר: כל הנרות מטלטלין, חוץ מן הנר הדולק בשבת.

Mishnah: The dispute in this Mishnah seems to be a local one; however, it is the key to several halakhot in the area of the prohibition of set-aside [muktze]. One may move a new oil lamp on Shabbat but not an old one that was already used. A lamp that was used is covered with soot and unsuitable for use. It is therefore considered set aside from use due to its disgusting nature. R' Shimon says: All oil lamps may be moved on Shabbat except for an oil lamp that is burning on Shabbat, due to the concern that it might be extinguished.