SB 7.15.1
sri-narada uvaca
karma-nistha dvijah kecit
tapo-nistha nrpapare
svadhyaye ’nye pravacane
kecana jñana-yogayoh
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Narada Muni continued: My dear King, some brahmanas are very much attached to fruitive activities, some are attached to austerities and penances, and still others study the Vedic literature, whereas some, although very few, cultivate knowledge and practice different yogas, especially bhakti-yoga.