Bhagavad Gita 3.20
कर्मणैव हि संसिद्धिमास्थिता जनकादयः।
लोकसंग्रहमेवापि संपश्यन्कर्तुमर्हसि।।3.20।।
Karmanaiva hi sansiddhimasthita janakadayah
Lokasangrahamevapi sampashyankartumarhasi
Simple meaning, written by AIIndeed, through action alone the ancestors and others achieve fulfillment; you should also see that the aim of action is the welfare of the world.