Bhagavad-gītā 4.12
BG 4.12
Open the full passageकाङ्क्षन्तः कर्मणां सिद्धिं यजन्त इह देवताः । क्षिप्रं हि मानुषे लोके सिद्धिर्भवति कर्मजा ॥१२॥
Sanskrit
kāṅkṣantaḥ karmaṇāṁ siddhiṁ yajanta iha devatāḥ kṣipraṁ hi mānuṣe loke siddhir bhavati karma-jā
Translation
Men in this world desire success in fruitive activities, and therefore they worship the demigods. Quickly, of course, men get results from fruitive work in this world.