Enraged at this answer, Hiraṇyakaśipu threw Prahlāda Mahārāja from his lap. Since Prahlāda was so treacherous that he had become a devotee of Viṣṇu, who had killed his uncle Hiraṇyākṣa, Hiraṇyakaśipu asked his assistants to kill him. The assistants of Hiraṇyakaśipu struck Prahlāda with sharp weapons, threw him under the feet of elephants, subjected him to hellish conditions, threw him from the peak of a mountain and tried to kill him in thousands of other ways, but they were unsuccessful. Hiraṇyakaśipu therefore became increasingly afraid of his son Prahlāda Mahārāja and arrested him. The sons of Hiraṇyakaśipu’s spiritual master, Śukrācārya, began teaching Prahlāda in their own way, but Prahlāda Mahārāja did not accept their instructions. While the teachers were absent from the classroom, Prahlāda Mahārāja began to preach Kṛṣṇa consciousness in the school, and by his instructions all his class friends, the sons of the demons, became devotees like him.