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SB 7.5.2

tau rājñā prāpitaṁ bālaṁ
 prahlādaṁ naya-kovidam
pāṭhayām āsatuḥ pāṭhyān
 anyāṁś cāsura-bālakān
Synonyms: 
tau — those two (Ṣaṇḍa and Amarka); rājñā — by the King; prāpitam — sent; bālam — the boy; prahlādam — named Prahlāda; naya-kovidam — who was aware of moral principles; pāṭhayām āsatuḥ — instructed; pāṭhyān — books of material knowledge; anyān — other; ca — also; asura-bālakān — sons of the asuras.
Translation: 
Prahlāda Mahārāja was already educated in devotional life, but when his father sent him to those two sons of Śukrācārya to be educated, they accepted him at their school along with the other sons of the asuras.