The Compendium of Caraka 6.7.73

6.7.73

khadirasuradārusāraṃ śrapayitvā tadrasena toyārthaḥ/
kṣaudraprasthe kāryaḥ kārye te cāṣṭapalike ca//

Having boiled the heartwood of khadira and devadāru, one should use their decoction in place of water / in a prastha of honey; both of these [woods] should be taken in the amount of eight palas.