Nyāya Sūtras 77.4

77.4

kim arthaṃ punar idam ucyate? pūrvoktanibandhanārtham/ yat tāvat pūrvoktam upalabdhihetor upalabdhiviṣayasya cārthasya pūrvāparasahabhāvāniyamād yathādarśanaṃ vibhāgavacanam iti, tad itaḥ samutthānaṃ yathā vijñāyeta/ anityam adarśī khalv ayam ṛṣir niyamena pratiṣedhaṃ pratyācaṣṭe --- traikālyasya cāyuktaḥ pratiṣedha iti/ tatraikāṃ vidhām udāharati śabdād ātodyasiddhivad iti/

Why, then, is this said? In order to connect with what was stated earlier. As for what was stated earlier—namely, that because there is no restriction of temporal sequence or simultaneity between the cause of apprehension and the object of apprehension, the statement of division is according to observation—so that its arising from this [sūtra] may be known. Indeed, this seer, observing what is not restricted, rejects the denial made by a fixed rule, [saying] that the denial of the three times is improper. There, he illustrates one manner: 'like the establishment of a musical instrument from sound.'