PB, 6, 3, 11.0 yat tv ity āhur gāyatraṃ prātaḥsavanaṃ traiṣṭubhaṃ mādhyandinaṃ savanaṃ jāgataṃ tṛtīyasavanaṃ kva tarhi turīyaṃ chando 'nuṣṭub iti //