Hiranyakeshigrihyasutra 1.3.9.16

1.3.9.16

yatkṣureṇa marcayatā supeśasā vaptarvapasi keśaśmaśru \ varcayā mukhaṃ mā na āyuḥ pramoṣīḥ \ iti vaptāraṃ samīkṣate \16\

With (the formula), 'If thou shavest, O shaver, my hair and my beard with the razor, the wounding, the well-shaped, make our face resplendent, but do not take away our life'—(the student who is going to take the bath), looks at the barber.