The Compendium of Suśruta 5.4.9

Suśrutasaṃhitā 5.4.9

teṣāṃ saṅkhyāṃ pravakṣyāmi yathāvadanupūrvaśaḥ/
aśītistveva sarpāṇāṃ bhidyate pañcadhā tu sā//