Adhyāya 3, Āhnika 1, Sūtra 56
pratiṣedhāc ca nānātvasiddhau sthāpanāhetur apy upādīyate —
indriyārthapañcatvāt // 3.1.56 //
arthaḥ prayojanam, tat pañcavidham indriyāṇām, sparśanenendriyeṇa sparśagrahaṇe sati na tenaiva rūpaṃ gṛhyata iti rūpagrahaṇaprayojanaṃ cakṣur anumīyate/
788 sparśarūpagrahaṇe ca tābhyām eva na gandho gṛhyata iti gandhagrahaṇaprayojanaṃ ghrāṇam anumīyate/ trayāṇāṃ grahaṇe na tair eva raso gṛhyata iti rasagrahaṇaprayojanaṃ rasanam anumīyate/ na ca caturṇāṃ grahaṇe tair eva śabdaḥ śrūyata iti śabdagrahaṇaprayojanaṃ śrotram anumīyate/ evam indriyaprayojanasyānitaretarasādhanasādhyatvāt pañcaivendriyāṇi//56//