Śrīmad-Bhāgavatam · Text 7.5.18
Who is speaking and story frame
इति तं विविधोपायैर्भीषयंस्तर्जनादिभि: ।
प्रह्रादं ग्राहयामास त्रिवर्गस्योपपादनम् ॥ १८ ॥
iti taṁ vividhopāyair
bhīṣayaṁs tarjanādibhiḥ
prahrādaṁ grāhayām āsa
tri-vargasyopapādanam
Ṣaṇḍa and Amarka, the teachers of Prahlāda Mahārāja, chastised and threatened their disciple in various ways and began teaching him about the paths of religion, economic development and sense gratification. This is the way they educated him.
Read Śrīla Prabhupāda's purport on Vedabase.io