Rasaprakashasudhakara 4.15

4.15

saṃpuṭe ca tato rundhyāt puṭayeddaśabhiḥ puṭaiḥ
mriyate nātra saṃdeho nirutthaṃ bhasma jāyate //

Then one should seal them in a crucible set and incinerate with ten incineration pits; / it is killed, there is no doubt here, and becomes an irrevocable calcined ash.