Astanga Hrudaya
दोषादीनां यथास्वं च विद्याद्दृद्धिक्षयौ भिषक्। क्षयेण विपरीतानां गुणानां वर्धनेन च॥२४॥
The decrease of Dosha Dhatu etc can be observed by the increase of opposite qualities. The increase of Dosha Dhatu etc can be observed by the increase of similar qualities.
english translation