גמרא שבת כ"א.:י"ב
אָמַר רַב הוּנָא: פְּתִילוֹת וּשְׁמָנִים שֶׁאָמְרוּ חֲכָמִים אֵין מַדְלִיקִין בָּהֶן בְּשַׁבָּת, אֵין מַדְלִיקִין בָּהֶן בַּחֲנוּכָּה, בֵּין בְּשַׁבָּת בֵּין בַּחוֹל. אָמַר רָבָא: מַאי טַעְמָא דְּרַב הוּנָא? קָסָבַר: כָּבְתָה – זָקוּק לָהּ, וּמוּתָּר לְהִשְׁתַּמֵּשׁ לְאוֹרָהּ. וְרַב חִסְדָּא אָמַר: מַדְלִיקִין בָּהֶן בַּחוֹל, אֲבָל לֹא בְּשַׁבָּת. קָסָבַר: כָּבְתָה –אֵין זָקוּק לָהּ, וּמוּתָּר לְהִשְׁתַּמֵּשׁ לְאוֹרָהּ. אָמַר רַבִּי זֵירָא אָמַר רַב מַתְנָה, וְאָמְרִי לַהּ אָמַר רַבִּי זֵירָא אָמַר רַב: פְּתִילוֹת וּשְׁמָנִים שֶׁאָמְרוּ חֲכָמִים אֵין מַדְלִיקִין בָּהֶן בְּשַׁבָּת, מַדְלִיקִין בָּהֶן בַּחֲנוּכָּה, בֵּין בַּחוֹל בֵּין בְּשַׁבָּת. אָמַר רַבִּי יִרְמְיָה: מַאי טַעְמָא דְּרַב? קָסָבַר: בכָּבְתָה – אֵין זָקוּק לָהּ, וְאָסוּר לְהִשְׁתַּמֵּשׁ לְאוֹרָהּ.
Rav Huna said: Those wicks and oils with which the Sages said that one may not light the lamp on Shabbat, one may not light the lamp with them on Hanukkah either; both when it falls on Shabbat and when it falls during the week. Rava said: What is the reason for Rav Huna’s statement? He holds that if the Hanukkah light becomes extinguished, even though one lit it properly, one is bound to attend to it and relight it so that it will burn properly. Therefore, one must ensure that the wick burns properly from the outset. And utilizing the light of the Hanukkah lamp is permitted during the week. Consequently, in order to prevent him from inadvertently sinning on Shabbat, he must ensure from the outset that the wick burns well, lest he come to adjust the flame on Shabbat. Those wicks and oils do not burn well at all. And Rav Ḥisda said: Those same oils and wicks with which the Sages prohibited to light on Shabbat, one may light with them on Hanukkah during the week, but not on Shabbat. He holds that if the Hanukkah light is extinguished ne is not bound to attend to it. Therefore, there is no reason to make certain from the outset to light it with materials that burn well, as even if it is extinguished, he is not required to relight it. However, he also holds that it is permitted to use its light. As a result, he must ensure that the wick burns well on Shabbat; if not, he is liable to come to adjust the flame in order to use its light. The third opinion is that which Rabbi Zeira said that Rav Mattana said, and others say that Rabbi Zeira said that Rav said: The wicks and oils with which the Sages said one may not light on Shabbat, one may, nevertheless, light with them on Hanukkah, both during the week and on Shabbat. Rabbi Yirmeya said: What is Rav’s reason? He holds that if it is extinguished, one is not bound to attend to it and relight it, and it is prohibited to use its light. Therefore, even on Shabbat, there is no concern lest he come to adjust the wick, as it is prohibited to utilize its light.
גמרא שבת כ"ג::ז'
"וְלֹא בְּשֶׁמֶן שְׂרֵיפָה וְכוּ' " – מַאי שֶׁמֶן שְׂרֵיפָה? אָמַר רַבָּה: שֶׁמֶן שֶׁל תְּרוּמָה שֶׁנִּטְמְאָה. וְאַמַּאי קָרוּ לֵהּ "שֶׁמֶן שְׂרֵיפָה"? הוֹאִיל וְלִשְׂרֵיפָה עוֹמֵד. וּבְשַׁבָּת מַאי טַעְמָא לָא? מִתּוֹךְ שֶׁמִּצְוָה עָלָיו לְבַעֲרוֹ, גְּזֵרָה שֶׁמָּא יַטֶּה. אָמַר לֵיהּ אַבָּיֵי: אֶלָּא מֵעַתָּה, בְּיוֹם טוֹב לִישְׁתְּרֵי? אַלְּמָה תְּנַן: "אֵין מַדְלִיקִין בְּשֶׁמֶן שְׂרֵיפָה בְּיוֹם טוֹב"!? גְּזֵרָה יוֹם טוֹב אַטּוּ שַׁבָּת.
We learned in the mishna that one may not light with burnt oil on Shabbat. The Gemara asks: What is burnt oil? Rabba said: It is oil of teruma that became ritually impure. And why did they call it burnt oil? Because its burning is imminent, as it is prohibited to eat this oil and one is obligated to burn it. The Gemara asks: And what is the reason that one may not light with it on Shabbat? The Gemara explains: Because it is a mitzva to burn it, the Sages issued a decree lest, in doing so, he come to adjust the wick in order to hasten its burning.
According to Rav, one should not be allowed to light with שמן שריפה on Shabbos Chanukah b/c he will come to adjust the wick?? So how does he permit it?
Even according to Rav Huna it should be permitted to light with שמן שריפה during the week b/c it lights well and we are not concerned that it will go out??! So how does he forbid it?
