C. The divine lights that were lost due to the sin of the golden calf, and their return on Shabbos:^[1]

The sin of the golden calf caused Moshe to lose 1000 Divine lights that he was able to experience. On Shabbos, however, these lights are returned to him as a gift. On this it says in the Shabbos Shemoneh Esrei prayer “Yismach Moshe Bematnas Chelko,” that Moshe rejoices in his portion.

[1] Torah Or p. 1b lines 32-34