MṛgṬīkā zu MṛgT, Vidyāpāda, 6, 5.2, 1.0 yatsadbhāva eva yasya bhāvastattasya kāryamiti niyamo'trāvaśyaṃ pratijñātavyo'nyathā tadabhāve'pi bhavatas tatkāryatvāyogāt yathāgnisadbhāva eva sambhavan dhūmo'gnikāryaḥ //