Srimad Bhagavatam Canto 09, Chapter 18, Text 42

SB 9.18.42

aprcchat tanayam purum
 vayasonam gunadhikam
na tvam agrajavad vatsa
 mam pratyakhyatum arhasi
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
King Yayati then requested Puru, 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.”