PURPORT

In ceremonies when brahmanas and Vaisnavas are sumptuously fed, the host partakes of the remnants of foodstuff after the guest has given permission. So the descendants of Vrsni and Bhoja formally took permission from the brahmanas and ate the prepared foodstuff. Ksatriyas are permitted to drink at certain occasions, so they all drank a kind of light liquor made of rice. By such drinking they became delirious and bereft of sense, so much so that they forgot their relationship with one another and used harsh words which touched the cores of each other's hearts. Drinking is so harmful that even such a highly cultured family becomes affected by intoxication and can forget themselves in a drunken state. The descendants of Vrsni and Bhoja were not expected to forget themselves in this way, but by the will of the Supreme it happened, and thus they became harsh towards one another.