פירוש על מגילה 32:8

"Light" - this is Torah: As Haman decreed against them, that they not occupy themselves with Torah [study].

This is the Festivals: They observed festivals about them.

This is circumcision: And he made decrees against all of these [things].

Your utterance: This is circumcision, that was given with saying, and not with speech: "And God said to Avraham, 'You shall keep My covenant'" (Genesis 17:9). And we have found that David was gladdened by it, as it is stated (in Psalms 6), "For the choirmaster, upon the sheminit (an eight-stringed lyre, but here taken as a reference to circumcision which happens on the eighth day)" - when he was in the bathhouse and he saw himself without Torah and without commandments; when (he gazed) at the circumcision, he was gladdened.