References

RKDh, 1, 1, 250.1
  sandhyārabhyodayo yāvatsūryabimbaṃ ca dṛśyate /Context
RKDh, 1, 2, 26.2
  atra sūryapuṭāni prātaḥkālād ārabhya sandhyāparyantaṃ śuṣkamardanena saṃpādanīyāni /Context
RKDh, 1, 2, 26.3
  bhāvanā tu sandhyāyāṃ yathārdratā sampadyate tathā kāryā /Context