tapaḥsvādhyāyeśvarapraṇidhānāni kriyāyogaḥ [YS 2.1]

nātapasvino yogaḥ sidhyati. anādikarmakleśavāsanācitrā pratyupasthitaviṣayajālā cāśuddhir nāntareṇa tapaḥ saṃbhedam āpadyata iti tapasa upādānam. tac ca cittaprasādanam abādhamānam anenāsevyam iti manyate.

svādhyāyaḥ praṇavādipavitrāṇāṃ japo mokṣaśāstrādhyayanaṃ vā. īśvarapraṇidhānaṃ sarvakriyāṇāṃ paramagurāv arpaṇaṃ tatphalasaṃnyāso vā.

sa hi kriyāyogaḥ ---