रामायण - अरण्य - चतुर्भाग

यत् करोति परं धर्मं मुनिर्मूलफलाशनः |
तत्र राज्ञश्चतुर्भागः प्रजा धर्मेण रक्षतः ||

- रामायण, अरण्य

If the king is protecting his subjects properly (according to the moral code of life) then he is entitled to one fourth of the 'good-will' earned by sadhus doing penance in his kingdom.

- Ramayana, Aranya