The Compendium of Bheḷa 6.2.28

6.2.28

kiṃśukaśceti bhāgāḥ syuḥ pṛthakpañcapalonmitāḥ | jaladroṇe vipaktavyaṃ caturbhāgāvaśeṣitam ||

and kiṃśuka—these should be parts measuring five palas individually; / it should be boiled in a droṇa of water until reduced to a fourth part.