“Rabbi, is there any religious requirement for Jewish men to wear mezuzahs around their necks?” “Rabbi, if you yourself are clean-shaven, why does this inmate claim his Jewish religion prohibits him from using a razor on his face?”
After Hashem commanded Moshe and Aharon to be the emissaries to free the Jewish people, the Torah lays out their lineage. At the conclusion, the Torah repeats the names of Aharon and Moshe, this time in reverse order, with Aaron mentioned before Moshe.