Chandahsutra 4.40

4.40

yadā jāgatau pādau parau bhavataḥ, gāyatrī ca pūrbbau, tadā āstārapaṅktirnāma || yathā ṛgvede—“bhadraṃ no api vātaya (1) sano dakṣamuta kratum (2) | adhā te sakhye andhaso vivo made (3) raṇan gāvo na yavase vivakṣase (4) ||”