ṢB, 4, 6, 1.1 atirātraś caturviṃśaṃ prāyaṇīyam ahar abhijit trayaḥ svarasāmāno divākīrtyam ahas trayaḥ svarasāmāno viśvajin mahāvrataṃ cātirātraś ca //