Srimad-Bhagavatam: Canto 9 - Chapter 1 - Verse 42
Sanskrit:
अपृच्छत् तनयं पूरुं वयसोनं गुणाधिकम् ।न त्वमग्रजवद् वत्स मां प्रत्याख्यातुमर्हसि ॥ ४२ ॥
ITRANS:
apṛcchat tanayaṁ pūruṁvayasonaṁ guṇādhikamna tvam agrajavad vatsamāṁ pratyākhyātum arhasi
Translation:
King Yayāti then requested Pūru, who was younger than these three brothers but more qualified, “My dear son, do not be disobedient like your elder brothers, for that is not your duty.”