Once the Bodhisatta was born as Mahiṃsāsa, son of the king of Bārāṇasī. His brother was Canda and his stepbrother Suriya. Suriya’s mother, having been granted a boon, claimed for him the kingdom. Mahiṃsāsa and Canda thereupon went into exile, but they were accompanied by Suriya. Arrived in Himavā, Mahiṃsāsa sent his two brothers to fetch water from a pool. There, first Suriya and then Canda, were seized by a demon who had been allowed by Vessavaṇa to eat anyone entering the pond, provided he did not know the Devadhamma. Mahiṃsāsa then went himself to the pond, and on being questioned by the demon, taught him the Devadhamma — which is to shrink from sin. The demon was pleased, and offered to release one of his victims. Mahiṃsāsa chose Suriya, and gave as his reason that he was afraid of being blamed by others. Thereupon the demon gave up both his brothers and showed the Bodhisatta great honour. The Bodhisatta converted him and he gave up his evil ways.
The story was related in reference to a rich man of Sāvatthi who joined the Order after his wife’s death. However, he continued to enjoy all kinds of luxuries until, arraigned before the Buddha, he pulled off his robes and stood only in his waist-
The Nacca Jātaka was taught in reference to the same monk.