Vindhyas are seen as the demarcating line between the territories of the Indo-Aryans and that of the others. The most ancient Hindu texts consider it as the southern boundary of Aryavarta. The Mahabharata mentions that the Nishadas and other Mleccha tribes reside in the forests of the Vindhyas. Although the Indo-Aryan languages (such as Marathi and Konkani) spread to the south of Vindhyas later, the Vindhyas continued to be seen as the traditional boundary between the northern and the southern Indian nations. Vindhyas appear prominently in the Indian mythological tales. Although the Vindhyas are not very high, historically, they were considered highly inaccessible and dangerous due to dense vegetation and the hostile tribes residing there. In the older Sanskrit texts, such as the Ramayana, they are described as the unknown territory infested with cannibals and demons. The later texts describe the Vindhya range as the residence of fierce form of Shakti (goddess Kali or Durga), who has lived there since slaying the demons. She is described as Vindhyavasini ("Vindhya dweller"), and a temple dedicated to her is located in the Vindhyachal town of Uttar Pradesh. The Mahabharata mentions the Vindhyas as the "eternal abode" of Kali. According to one legend, the Vindhya mountain once competed with the Mount Meru, growing so high that it obstructed the sun. The sage Agastya then asked Vindhya to lower itself, in order to facilitate his passage across to the south. In reverence for Agastya, the Vindhya lowered its height and promised not to grow until Agastya returned to the north. Agastya settled in the south, and the Vindhya mountain, true to its word, never grew further. The Kishkindha Kanda of Valmiki's Ramayana mentions that Maya built a mansion in the Vindhyas. In Dashakumaracharita, the King Rajahamsa of Magadha and his ministers create a new colony in the Vindhya forest, after being forced out of their kingdom following a war defeat. The Vindhyas are one of the only two mountain ranges mentioned in the national anthem of India, the other being the Himalayas. Rivers Several tributaries of the Ganga-Yamuna system originate from the Vindhyas. These include Chambal, Betwa, Dhasan, Ken, Tamsa, Kali Sindh and Parbati. The northern slopes of the Vindhyas are drained by these rivers. Narmada and Son rivers drain the southern slopes of the Vindhyas. Both these rivers rise in the Maikal hills, which are now defined as an extension of the Satpuras,