The Compendium of Kāśyapa 1.27.61

1.27.61

tamevopakrametādau siddhiskāmo bhiṣagvaraḥ
yo hetuḥ pittarogāṇāṃ raktajānāṃ sa eva tu

that very one the best of physicians, desiring success, should treat first.’ / The very cause of pitta diseases is the cause of blood-born disorders;