Ketubot 111b
Ketubot 111b:4
אָמַר רַבִּי אֶלְעָזָר: עַמֵּי הָאֲרָצוֹת אֵינָן חַיִּים, שֶׁנֶּאֱמַר: ״מֵתִים בַּל יִחְיוּ וְגוֹ׳״, תַּנְיָא נָמֵי הָכִי: ״מֵתִים בַּל יִחְיוּ״, יָכוֹל לַכֹּל — תַּלְמוּד לוֹמַר: ״רְפָאִים בַּל יָקוּמוּ״, בִּמְרַפֶּה עַצְמוֹ מִדִּבְרֵי תוֹרָה הַכָּתוּב מְדַבֵּר. אֲמַר לֵיהּ רַבִּי יוֹחָנָן: לָא נִיחָא לְמָרַיְיהוּ דְּאָמְרַתְּ לְהוּ הָכִי, הָהוּא בִּמְרַפֶּה עַצְמוֹ לַעֲבוֹדָה זָרָה הוּא דִּכְתִיב. אֲמַר לֵיהּ: מִקְרָא אַחֵר אֲנִי דּוֹרֵשׁ, דִּכְתִיב: ״כִּי טַל אוֹרוֹת טַלֶּיךָ וָאָרֶץ רְפָאִים תַּפִּיל״, כׇּל הַמִּשְׁתַּמֵּשׁ בְּאוֹר תּוֹרָה — אוֹר תּוֹרָה מְחַיֵּיהוּ, וְכֹל שֶׁאֵין מִשְׁתַּמֵּשׁ בְּאוֹר תּוֹרָה — אֵין אוֹר תּוֹרָה מְחַיֵּיהוּ.
§ Rabbi Elazar said: The common, uneducated people will not come alive in the future, as it is stated: “The dead live not” (Isaiah 26:14). In other words, those who were already considered dead in their lifetimes will not come back to life afterward either. This idea is also taught in a baraita: “The dead live not”; one might have thought that this is referring to everyone, i.e., none of the dead will live again. Therefore, the verse states: “The shades [refa’im] rise not” (Isaiah 26:14). This teaches that the verse is speaking of one who weakens [merapeh] himself from matters of Torah. Rabbi Yoḥanan said to Rabbi Elazar: Their master, i.e. God, is not pleased that you say this of ordinary Jews. Rather, that verse is written about one who weakens himself and succumbs to idol worship. Those who commit this great sin do not merit to be resurrected in the future. Rabbi Elazar said to him: I teach it from a different verse, as it is written: “For Your dew is as the dew of light, and the earth shall bring to life the shades” (Isaiah 26:19). Rabbi Elazar explains: Anyone who uses the light of Torah, which is called the dew of light, the light of Torah will revive him; and anyone who does not use the light of Torah, the light of Torah will not revive him.