The Compendium of Caraka 4.1.17

4.1.17

punaśca dhātubhedena caturviṃśatikaḥ smṛtaḥ/
mano daśendriyāṇyarthāḥ prakṛtiścāṣṭadhātukī//

And again, by classification of elements, he is considered twenty-four-fold: / the mind, the ten sense organs, the sense objects, and the eightfold original nature.