The story
Narakāsura, the demon king of Prāgjyotiṣa (Assam), had taken sixteen thousand women captive and stolen the earrings of Aditi, mother of the gods. Kṛṣṇa flew to his city on Garuḍa with Satyabhāmā beside him, and in some tellings it is she who fires the killing arrow, since the demon could only die by his mother's hand and Satyabhāmā was Bhūmi, the earth, reborn.
The dying demon asked that his death be remembered with lamps and colour, not mourning. The oil bath before sunrise stands for the bath Kṛṣṇa took after the battle, and in the south the greeting of the morning is Gaṅgā snānam āccā?: have you had your Ganges bath?
In Goa the night before is given to huge effigies of Narkāsur, paraded and burned at dawn; the competitions for the biggest run across the state.
