Agniveshyagrihyasutra 1.2.3.3

1.2.3.3

atha pariṣicya agne vratapate śukriyebhyo vrataṃ cariṣyāmi iti devatā upasthāpyāhatena vāsasā śiraḥ samukhamabhiveṣṭayati citaḥ stha paricitaḥ paritvā girvaṇo gira imā bhavantu viśvataḥ \

Then, having circum-poured water and invoked the deities with: 'O Agni, lord of vows, I shall perform the vow for the Śukriya [hymns],' he wraps his head together with the face in an unwashed garment [saying]: 'You are piled up, completely piled up; O praise-loving one, let these hymns encircle you on every side.'