नचापि वह्निर्जनकः काष्ठेष्वेव हि दर्शनात् ।
अत एव यत्र वह्निर्भास्वान्नो धूमिताऽत्र तु ॥५१॥
nacāpi vahnirjanakaḥ kāṣṭheṣveva hi darśanāt |
ata eva yatra vahnirbhāsvānno dhūmitā'tra tu
Nor is fire the (sole) producer of smoke, since (smoke) is observed (to arise) only in (damp) wood and the like; and for this very reason, where the fire blazes bright, there is no smokiness at all (so the pervasion fails).