The Compendium of Caraka 1.8.14

1.8.14

tatrānumānagamyānāṃ pañcamahābhūtavikārasamudāyātmakānāmapi satāmindriyāṇāṃ tejaścakṣuṣi khaṃ śrotre ghrāṇe kṣitiḥ āpo rasane sparśane 'anilo viśeṣeṇopapadyate /

Among these senses, which are accessible by inference and are composed of aggregates of modifications of the five great elements, light belongs especially to the visual faculty, space to the auditory, earth to the olfactory, water to the gustatory, and wind to the tactile.