Sarvadarshanasangraha 15.148

15.148

sa ca yogo yamādibhedavaśād aṣṭāṅga iti nirdiṣṭaḥ/ tatra yamā ahiṃsādayaḥ/ tad āha patañjaliḥ — ahiṃsāsatyāsteyabrahmacaryāparigrahā yamāḥ/ iti/ niyamāḥ śaucādayaḥ/ tad apy āha — śaucasaṃtoṣatapaḥsvādhyāyeśvarapraṇidhānāni niyamāḥ iti/ ete ca yamaniyamā viṣṇupurāṇe darśitāḥ —

And that yoga is indicated as having eight limbs, according to the distinction of the restraints (yama) and the rest. Among them, the restraints begin with non-violence. So Patañjali says: "Non-violence, truthfulness, non-stealing, celibacy, and non-possessiveness are the restraints." The observances (niyama) begin with cleanliness. So he also says: "Cleanliness, contentment, asceticism, study of scripture, and dedication to God are the observances." And these restraints and observances are shown in the Viṣṇu Purāṇa: