Musar for Kiddushin 78:7
דתניא רבי יעקב אומר אין לך כל מצוה ומצוה שכתובה בתורה שמתן שכרה בצדה שאין תחיית המתים תלויה בה בכיבוד אב ואם כתיב (דברים ה, טו) למען יאריכון ימיך ולמען ייטב לך בשילוח הקן כתיב (דברים כב, ז) למען ייטב לך והארכת ימים
and is as though he had fulfilled the whole Torah, not omitting even a single letter! - Said Abaye: Our Mishnah means that a festive day and an evil day are prepared for him,<span class="x" onmousemove="('comment',' By 'good is done to him' the Mishnah means that he is punished in this world; this punishment is regarded as a festive day for him, since he thereby wholly enjoys the next. Conversely the second half of the MISHNAH:');"><sup>16</sup></span> Raba said: This latter agrees with R'Jacob, who said: There is no reward for precepts in this world.<span class="x" onmousemove="('comment',' But our Mishnah disagrees, and is literally meant, referring to this world.');"><sup>17</sup></span> For it was taught: R'Jacob said: There is not a single precept in the Torah whose reward is [stated] at its sid which is not dependent on the resurrection of the dead.<span class="x" onmousemove="('comment',' Which shews that the reward spoken of is in the next world. R. Jacob appears to identify the next world with resurrection; v. Sanh. (Sonc. ed.) p. 601, n. 3.');"><sup>18</sup></span>