Verse
असक्तबुद्धिः सर्वत्र जितात्मा विगतस्पृहः ।नैष्कर्म्यसिद्धिं परमां संन्यासेनाधिगच्छति ॥
An understanding without attachment in all things, a soul self-conquered and empty of desire, man attains by renunciation a supreme perfection of naiṣkarmya.
Gītā 18·49