Tirumala Saptarishi Theertham:
There are seven holy Theerthams created by Saptharishi’s named Kashyapa, Atri, Bharadwaja, Vishwamitra, Gautama, Vasishta and Jamadagni. Holy water with magical powers.
Of these seven tirthas, the first one possesses ten times greater merit than that of all the previously mentioned tirthas taken together, and each successive one among the seven similar possesses merit ten times greater than that of each prior one.
Tirumala Saptarishi Theertham History, Route