Matsyapurana 122.37

122.37

tāḥ pibanti sadā hṛṣṭā nadīrjanapadāstu te
ete śāntabhayāḥ proktāḥ pramodā ye ca vai śivāḥ //

It is very difficult to enumerate and give proper measurements of all those rivers and rivulets. They are all sacred. The people of the janapadas who drink their waters get happiness. Śântabhaya, Pramâda, Śiva, Ânanda, Sukha, Kṣemaka, and Nava; such are the seven janapadas situated there, where all the rules and customs (Âchâra) of Varṇa and Âśrama are observed.—36-38.