וּמֵעוֹלָ֥ם לֹא־שָׁמְע֖וּ לֹ֣א הֶאֱזִ֑ינוּ עַ֣יִן לֹֽא־רָאָ֗תָה אֱלֹהִים֙ זוּלָ֣תְךָ֔ יַעֲשֶׂ֖ה לִמְחַכֵּה־לֽוֹ׃
And whereof from of old men have not heard, nor perceived by the ear, neither hath the eye seen a God beside Thee, who worketh for him that waiteth for Him.
Mishnah Sanhedrin
All Israel have a portion in the world to come, for it says, “Your people, all of them righteous, shall possess the land for ever; They are the shoot that I planted, my handiwork in which I glory” (Isaiah 60:21). And these are the ones who have no portion in the world to come: He who maintains that resurrection is not a biblical doctrine, that the torah was not divinely revealed, and an epikoros. Rabbi Akiva says: “Even one who reads non-canonical books and one who whispers [a charm] over a wound and says, “I will not bring upon you any of the diseases which i brought upon the Egyptians: for I the lord am you healer” (Exodus 15:26). Abba Shaul says: “Also one who pronounces the divine name as it is spelled.”