Verse
न कर्मणामनारम्भान् नैष्कर्म्यं पुरुषोऽश्नुते ।न च संन्यसनादेव सिद्धिं समधिगच्छति ॥
Not by abstention from works does a man enjoy actionlessness, nor by mere renunciation (of works) does he attain to his perfection (to siddhi, the accomplishment of the aims of his self-discipline by Yoga).
Gītā 3·4