The teachers Ṣaṇḍa and Amarka instructed Prahlāda Mahārāja in the three kinds of material advancement called religion, economic development and sense gratification. Prahlāda, however, being situated above such instructions, did not like them, for such instructions are based on the duality of worldly affairs, which involve one in a materialistic way of life marked by birth, death, old age and disease.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
यथा त्रिवर्गं गुरुभिरात्मने उपशिक्षितम् । न साधु मेने तच्छिक्षां द्वन्द्वारामोपवर्णिताम्
yathā trivargaṃ gurubhirātmane upaśikṣitam | na sādhu mene tacchikṣāṃ dvandvārāmopavarṇitām
SB 7.5.53