One verse

Srimad Bhagavatam 7.5.2

7.5.2

तौ राज्ञा प्रापितं बालं प्रह्लादं नयकोविदम् । पाठयामासतु: पाठ्यानन्यांश्चासुरबालकान् ॥ २ ॥

tau rajna prapitam balam prahladam naya-kovidam pathayam asatuh pathyan anyams casura-balakan

tau
those two (Sanda and Amarka)
rajna
by the King
prapitam
sent
balam
the boy
prahladam
named Prahlada
naya-kovidam
who was aware of moral principles
pathayam asatuh
instructed
pathyan
books of material knowledge
anyan
other
ca
also
asura-balakan
sons of the asuras.

Prahlada Maharaja was already educated in devotional life, but when his father sent him to those two sons of Sukracarya to be educated, they accepted him at their school along with the other sons of the asuras.