Rasamanjari 2.25

2.25

sacchidrāyāṃ mṛdaḥ sthālyāṃ kūpikāṃ saṃniveśayet /
pūrayet sikatāpurair ā galaṃ matimān bhiṣak //

The intelligent physician should place the flask in an earthen pot that has an opening;