Astanga Hrudaya
यथाबलं यथास्वं च दोषा वृद्धा वितन्वते। रूपाणि, जहति क्षीणाः, समाः स्वं कर्म कुर्वते॥४४॥
The Doshas, when increased produce their respective features (signs and symptoms) depending upon their strength; when decreased they do not produce signs and symptoms and when normal, they attend to their normal functions.
english translation