References

RAdhy, 1, 28.1
  niyāmako 'ṣṭamaḥ prokto navamastu nirodhakaḥ /Context
RAdhy, 1, 86.2
  ayaṃ niyāmako nāma saṃskāro hy aṣṭamaḥ smṛtaḥ //Context
RArṇ, 10, 58.1
  rasaṃ niyāmake dadyāt tejasvī nirmalo bhavet /Context