Yoga Sūtra Chapter Two verse 55
ततः परमावश्यता इन्द्रियाणाम् ॥५५॥
tataḥ paramā vaśyatā-indriyāṇām ||55||
From that, best control of the senses.
tatas - hence, from thatparama - highest, supreme, chief; the supreme or absolute being, the universal soul; mostvaśyatā - controlindriya - faculty of sense; sense; organ of sense; organs of motor action and sensory perceptionCommentaries and Reflections
Commentary by Paul Harvey:
“Pratyāhāra is both a Sādhana and a Siddhi.
In that, it is a Siddhi of Prāṇāyāma,
as well as a Sādhana for Dhāraṇā.”