Yoga Sutras of Patanjali · 2.45

समाधिसिद्धिरीश्वरप्रणिधानात् ॥४५॥

samādhi-siddhir īśvara-praṇidhānāt

From surrender to the Lord comes the attainment of samadhi.

— Yoga Sutras of Patanjali 2.45

Source: Sanskrit attributed to Patanjali (c. 2nd century BCE – 4th century CE). Public-domain English readings drawn from Swami Vivekananda's 'Raja Yoga' (1896) and Charles Johnston's 'The Yoga Sutras of Patanjali' (1912).