The Sadducees asked Rabban Gamliel: From where do we know that the Holy One, blessed be He, revives the dead? He said to them: From the Torah, and from the Prophets, and from the Writings. But they did not accept it from him. From the Torah, as it is written: "And the LORD said to Moses: Behold, you are about to lie down with your fathers, and you will rise" (Deuteronomy 31:16). They said to him: But perhaps it means "and this people will rise up and go astray" (the same words read as the start of the next clause)? From the Prophets, as it is written: "Your dead shall live, my corpses shall arise; awake and sing, you who dwell in the dust, for your dew is a dew of lights, and the earth shall cast forth the shades" (Isaiah 26:19).
The Resurrection Of The Dead
Sanhedrin 90b-91b
שָׁאֲלוּ צַדּוּקִים אֶת רַבָּן גַּמְלִיאֵל: מִנַּיִין שֶׁהַקָּדוֹשׁ בָּרוּךְ הוּא מְחַיֶּיה מֵתִים? אָמַר לָהֶם: מִן הַתּוֹרָה, וּמִן הַנְּבִיאִים, וּמִן הַכְּתוּבִים. וְלֹא קִיבְּלוּ מִמֶּנּוּ. מִן הַתּוֹרָה, דִּכְתִיב: ״וַיֹּאמֶר ה׳ אֶל מֹשֶׁה הִנְּךָ שֹׁכֵב עִם אֲבֹתֶיךָ וְקָם״. אָמְרוּ לוֹ: וְדִילְמָא ״וְקָם הָעָם הַזֶּה וְזָנָה״? מִן הַנְּבִיאִים, דִּכְתִיב: ״יִחְיוּ מֵתֶיךָ נְבֵלָתִי יְקוּמוּן הָקִיצוּ וְרַנְּנוּ שֹׁכְנֵי עָפָר כִּי טַל אוֹרֹת טַלֶּךָ וָאָרֶץ רְפָאִים תַּפִּיל״.