הִנֵּ֤ה נַחֲלַ֣ת יְהוָ֣ה בָּנִ֑ים שָׂ֝כָ֗ר פְּרִ֣י הַבָּֽטֶן׃
Ein Geschenk des Herrn sind Söhne, sein Lohn die Leibesfrucht.
Rashi on Psalms
Behold, the heritage of the Lord for that man [who banishes sleep from his eyes].
Rashi on Psalms
sons These are the disciples whom he sets up, who are to him like sons.
Rashi on Psalms
the reward is the fruit of the innards The reward is the fruit of the Torah that is in his heart as it is said (Prov. 22:18): “For it is pleasant that you guard them in your innards.”