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 perception

Commentaries 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.”