Charak Samhita
पिप्पलीमधुलिप्तानि स्वेदयेन्मृत्कुशान्तरे। शोषयेदातपेऽग्न्यर्कौ हतो ह्येषां विकाशिताम्॥५॥
These roots are smeared with the paste of pippali (Piper longum Linn.), madhu (honey), wrapped with kusha ( Desmostachya bipinnata Stapf.) coated with mud and baked. Roots are separated and dried under sunlight. This process reduces the vikasi property of the drugs.
english translation