asataḥ prāgasāmarthyāt sāmarthye kāryasambhavāt / kāryakāraṇayoḥ spaṣṭaṃ yaugapadyaṃ virudhyate
Because what is non-existent has no prior potency, [and] if there were potency the effect would [already] exist, simultaneity between cause and effect is clearly contradictory.