योगिनश्चित्तशान्त्यर्थं कुर्वन्ति प्राणरोधनम् ।प्राणायामैस्तथा ध्यानैः प्रयोगैर्युक्तिकल्पितैः
In plain words
Yogins, for the sake of citta's peace, undertake the restraining of prāṇa — through the breath-disciplines, and through meditations and practices devised by skillful method.