SB 5.1.40, Translation and Purport
"To stop the quarreling among different peoples, Mahārāja Priyavrata marked boundaries at rivers and at the edges of mountains and forests so that no one would trespass upon another's property."
The example set by Mahārāja Priyavrata in marking off different states is still followed. As indicated here, different classes of men are destined to live in different areas, and therefore the boundaries of various tracts of land, which are described here as islands, should be defined by different rivers, forests and hills. This is also mentioned in relation to Mahārāja Pṛthu, who was born from the dead body of his father by the manipulation of great sages. Mahārāja Pṛthu's father was very sinful, and therefore a black man called Niṣāda was first born from his dead body. The Naiṣāda race was given a place in the forest because by nature they are thieves and rogues. As animals are given places in various forests and h