Hiranyakeshigrihyasutra 2.1.6.11

2.1.6.11

uptvā yathocitaṃ cūḍāḥ kārayati yatharṣi vā \11\

Behind with (the Mantra), 'The razor with which Savitri, the knowing one, has shaven (the beard) of king Soma and Varuna, with that, ye Brâhmanas, shave his (head); make that he be united with vigour, with wealth, with glory.'
On the left side with (the Mantra), '(The razor) with which Pûshan has shaven (the beard) of Brihaspati, of Agni, of Indra, for the sake of long life, with that I shave thy (head), N.N.!'
Before with (the Mantra), 'That he may long live in joy, and may long see the sun.'