The Compendium of Caraka 6.28.157

6.28.157

(agniveśāya guruṇā kṛṣṇātreyeṇa bhāṣitam/) iti balātailam/
amṛtāyāstulāḥ pañca droṇeṣvaṣṭasvapāṃ pacet//

([Thus] spoken to Agniveśa by his teacher Kṛṣṇātreya.) Thus ends balā oil. / One should boil five tulās of amṛtā in eight droṇas of water;