Ca, Vim., 5, 6.1 tatra prāṇavahānāṃ srotasāṃ hṛdayaṃ mūlaṃ mahāsrotaśca praduṣṭānāṃ tu khalveṣāmidaṃ viśeṣavijñānaṃ bhavati tadyathā atisṛṣṭam atibaddhaṃ kupitamalpālpamabhīkṣṇaṃ vā saśabdaśūlam ucchvasantaṃ dṛṣṭvā prāṇavahānyasya srotāṃsi praduṣṭānīti vidyāt /

Ca, Indr., 8, 15.1 dīrghamucchvasya yo hrasvaṃ naro niḥśvasya tāmyati /