Verses on Sāṃkhya 27.4

27.4

śrotrādīni buddhīndriyāṇīti ucyante | śabdasparśarūparasagandhān buddhyanta iti buddhīndriyāṇi | indriyāṇy eva tānīndriyāṇi | in iti viṣayāṇāṃ nāma, tāninaḥ viṣayān prati dravantīti indriyāṇi | vākpāṇipādapāyūpasthān karmendriyāṇy āhuḥ | karma kurvanti kārayanti ca | karmendriyāṇāṃ vṛttiḥ | vāk vadatikarma, hastau grahaṇakarmāṇau, pādau viṣamasamanimnonnatabhūpradeśeṣu krāmataḥ, pāyur yathābhuktānnodakamalam utsṛjati, upastha ānandaṃ karoti putram utpādayatīty arthaḥ | evam etāḥ karmendriyāṇāṃ vṛttayo vyākhyātāḥ //

Those beginning with the ear are called sensory faculties. They are sensory faculties because they perceive sound, touch, form, taste, and odor. Those faculties are called faculties: "in" is a name for objects; they run towards those objects, hence they are "faculties" (indriyas). They call speech, hands, feet, the anus, and the genitals the action faculties. They perform and cause action. The functioning of the action faculties: speech has the function of speaking; the hands have the function of grasping; the two feet walk over uneven, even, low, and high terrain; the anus excretes the waste of ingested food and water; the genitals produce pleasure, that is, generate a son. Thus these functionings of the action faculties have been explained. //