There are three Parvas in the beginning (of this great work), namely Paushya, Pauloma and Astika, which contain many wonderful dictions and descriptions and senses.
पौष्यं तत्र च पौलोममास्तीकं चादितः स्मृतम्। विचित्रार्थपदाख्यानमनेकसमयान्वितम्॥