Verse
काङ्क्षन्तः कर्मणां सिद्धिं यजन्त इह देवताः ।क्षिप्रं हि मानुषे लोके सिद्धिर्भवति कर्मजा ॥
They who desire the fulfilment of their works on earth sacrifice to the gods (various forms and personalities of the one Godhead); because the fulfilment that is born of works (of works without knowledge) is very swift and easy in the human world.
Gītā 4·12