Bhagavad Gita Chapter 18 Verse 49
भगवद् गीता अध्याय 18 श्लोक 49

असक्तबुद्धिः सर्वत्र जितात्मा विगतस्पृहः।
नैष्कर्म्यसिद्धिं परमां संन्यासेनाधिगच्छति।।18.49।।



English Translation - Swami Sivananda
18.49 He whose intellect is unattached everywhere, who has subdued his self, from whom desire has fled,  he by renunciation, attains the supreme state of freedom from action.


English Translation of Sanskrit Commentary By Sri Shankaracharya's
18.49 Asakta-buddhih, he whose intellect, the internal organ, remains unattached; sarvatra, to everything, with regard to son, wife and others who are the cuases of attachment; jitatma, who has conered his internal organs; and vigata-sprhah, who is desireless, whose thirst for his body, life and objects of enjoyment have been eradicated;-he who is such a knower of the Self, adhigaccahti, attains; sannyasena, through monasticism, through perfect knowledge or through renunciation of all actions preceded by this knowledge; the paramam, supreme, most excellent; naiskarmya-siddhim, perfection consisting in the state of one free from duties.
One is said to be free from duties from whom duties have daparted as a result of realizing that the actionless Brahman is his Self; his state is naiskarmyam. That siddhi (perfection) which is this naiskarmya is naiskarmya-siddhi. Or, this phrase means achievement of naiskarmya, i.e., achievement of the state of remaining established in ones own real nature as the actionless Self-which is different from the success arising from Karma (-yoga), and is of the form of being established in the state of immediate Liberation. Accordingly has it been said, ৷৷.having given up all actions mentally,৷৷.without doing or causing (others) to do anything at all (5.13).
The stages through which one who has attained success-which has the aforesaid characteristics and which arises from the performance of ones own duties mentioned earlier as worship of God-, and in whom has arisen discriminative knowledge, achieves perfection-in the form of exclusive adherence to Knowledge of the Self and consisting in the state of one free from duties-have to be stated. With this is view the Lord says:


Transliteration Bhagavad Gita 18.49Asaktabuddhih sarvatra jitaatmaa vigatasprihah;
Naishkarmyasiddhim paramaam sannyaasenaadhigacchati.


Word Meanings Bhagavad Gita 18.49asakta-buddhiḥ—those whose intellect is unattached; sarvatra—everywhere; jita-ātmā—who have mastered their mind; vigata-spṛihaḥ—free from desires; naiṣhkarmya-siddhim—state of actionlessness; paramām—highest; sanyāsena—by the practice of renunciation; adhigachchhati—attain