ציטירנדיקער פּירוש אויף תהילים 68:4

אף חובב עמים, also members of the gentile nations, such as the mixed multitude whom Moses had accepted as converts at the time of the Exodus, and who had done so in order to receive the Torah, G’d became fond of and accepted them so that they too were included in the camp which His shechinah, benevolent presence, rested over the people. We have more direct confirmation of this in Psalms 68,4. “but the righteous shall rejoice, etc.”

However, one who transgresses by adding [to the Torah’s commandments], is increasing the provocation of the evil inclination. Perhaps with this addition, the Torah will not continue to provide strength to stand against it, because its power is only in matters that the Torah causes, for “the One who wounds is the One who heals.” Thus, this Nazirite is called a sinner from two perspectives: One, because before his Nazirite vow, he was like a breached city with no restraint to his spirit, until he needed to bind himself with the Nazirite vow; and two, because while being a Nazirite, he provokes the evil inclination within himself. Nevertheless, he shall be called holy if he stands against it, because all the schemes of the evil inclination are to breach his fence. And this is what [the Torah] says: And if someone dies near him suddenly (Numbers 6:9). This teaches that all this is the work of Satan, who arranged for this impure incident to happen to him suddenly, by accident and unknowingly, in order to defile his consecrated head. Therefore, he needed atonement for having sinned regarding the soul. And [he sinned by] afflicting himself from wine, because through this affliction he caused the evil inclination to be provoked within him and brought about circumstances to defile his Nazirite status. Furthermore, he needed atonement for afflicting himself and for not serving God with joy but with suffering. Joy indicates the perfection of the deed, as it is written: And see if there is a way of pain in me (Psalms 139:24). For if he had been joyful in his Nazirite vow, he would have been more careful to avoid impurity. But since he was not careful about it, this indicates that he was not happy with this Nazirite vow, and in this the evil inclination found a place to carry out whatever it planned to do. But the righteous shall rejoice and exult before God and shall be glad with joy (Psalms 68:4). The letter bet in with joy [b’simcha] means “in the merit of joy,” that they served God with joy as stated.