66 Crores Holy Waters of all 14 Worlds

Having become a river, Cauvery prays to God at

http://divyainfo.blogspot.com/search/label/Pot

, " Sire, of all rivers in the world, Ganga is said to be the most sacred. Make me greater than her." - God replies, "

1. Ganga is sacred because she starts from my feet. 
2. You become more sacred, by having my entire self near you.

https://ysics.blogspot.com/search/label/Ranga

According to Agni Puraanam

“ShaTShaShTi kOti tIrthAni dvisaptha bhuvanEShu cha.
KEshavasya AjnayA yAnti thulAmAse marudvridhAm”

Sixty-six crore Holy Waters in all the 14 worlds come to stay in Cauvery
in the month of Tula by the Order of Lord Keshava.

http://anudinam.org/tag/thula-kaveri/
http://en.wikipedia.org/wiki/Kaveri
http://www.truthstar.com/articles/The_glory_of_Tula_month_Holy_Bath.asp
https://www.youtube.com/results?search_query=tula+kaveri
http://venkatarangan.com/blog/2012/10/thula-masamganges-comes-to-kaveri/
http://knramesh.blogspot.in/2012/06/thula-masa-sri-kaveri-ashtottaram.html
https://www.slideshare.net/search/slideshow?searchfrom=header&q=tula+kaveri

Agasthiar the Disciple of Lord Murgan Being The Spouse of this Kaveri  and is Called Kumba Muni 

https://freeglobaluniversity.blogspot.com/search/label/Murugan

https://freeglobaluniversity.blogspot.com/search/label/Agastya