yayor evāgnidhūmaviśeṣayor viṣayabhūtayor gomayendhanaviśeṣabuddhiḥ kṛtā utpāditā puruṣeṇa gomayendhanaprabhavāvetāvagnidhūmāviti
Regarding those two particular objects, fire and smoke, a person forms the understanding about the specific fuel of cow-dung, [thinking] "these two, fire and smoke, arise from cow-dung fuel."