yÄ yÄḥ kathÄ bhagavataḥkathanÄ«yoru-karmaṇaḥguṇa-karmÄÅ›rayÄḥ pumbhiḥsaá¹sevyÄs tÄ bubhūṣubhiḥ
Bubhusubhih means “by those who desire their own good.†To do anything other than this is to waste one’s life.