Dakshasmriti 2.16

2.16

aṅguṣṭhena pradeśinyā ghrāṇaṃ paścādanantaram
aṅguṣṭhānāmikābhyāñca cakṣuḥśrotre punaḥ punaḥ

With the thumb and forefinger, the nose immediately thereafter; / with the thumb and ring finger, the eyes and ears repeatedly;