Hiranyakeshigrihyasutra 1.1.4.1

1.1.4.1

kumāramāsthāpayati \ ātiṣṭhemamaśmānamaśmeva tvaṃ sthiro bhava \ pramṛṇīhi durasyūnsahasva pṛtanāyataḥ \ iti \1\

Makes the boy tread on (that stone) with his right foot, with (the verse), 'Tread on this stone; like a stone be firm. Destroy those who seek to do thee harm; overcome thy enemies.'