Dear son Prahlāda, all peace and good fortune unto you. Kindly do not speak lies; just reply with the truth. These boys you see are not like you, for they do not speak in a deviant way. How have you learned these instructions? How has your intelligence been spoiled in this way?
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
वत्स प्रह्लाद भद्रं ते सत्यं कथय मा मृषा । बालानति कुतस्तुभ्यमेष बुद्धिविपर्ययः
vatsa prahlāda bhadraṃ te satyaṃ kathaya mā mṛṣā | bālānati kutastubhyameṣa buddhiviparyayaḥ
SB 7.5.9