Agniveshyagrihyasutra 1.2.3.14

1.2.3.14

etāmeva diśamupaniṣkramyāchadirdarśe 'gnimupasamādhāya paristīrya madantīradhiśritya pūrvo śāntiṃ kṛtvā dyauḥ samid ityetābhiścatasṛbhiḥ audumbarīḥ samidha ādhāyātha pariṣicya āditya vratapate śukriyebhyo vratamacāriṣam ityetābhirdevatā upasthāya gurave gāṃ dadāti \

Having gone out in that very same direction to a place out of sight of roofs, having set up the fire, strewn [grass] around, set over the heating waters, performed the preliminary pacification rite, placed the udumbara fuel-sticks on [the fire] with these four [verses beginning with]: 'The sky is the fuel-stick,' then having circum-poured water and invoked the deities with these [words]: 'O Aditya, lord of vows, I have performed the vow for the Śukriya [hymns],' he gives a cow to the teacher.