Story of kaveri river

Among the various stories, Sage Agastya saved the Bharatavarsha from imbalance. Mount Vindhyachala (Madhyapradesh) was continually growing in size due to taunting comments by the Sage Narada. So as to temper the vanity of the mountains, Sage Agastya and his family traveled to South India, via the mount Vindhyachal. On their way, when the Vindhya saw Sage Agastya, he bowed with respect and reverence, upon which Sage Agastya, jokingly asked, if he would stay bowed and subdued with respect until the sage returned? The Vindhyas were truly benevolent and promised to not grow until the Sages return from the South. After passing through the mountain, sage Agastya told his wife that they would never again cross over to the North side of mount Vindhyas (Its still balancing the Bharatvarsha).