Hindu theology views rivers as goddesses who confer blessings and spiritual purification and their release from the grip of the demon of drought is a recurring theme in the mythology. India is a country blessed with many rivers, but of these, seven are considered to be particularly important. Known collectively as Saptaganga, Sapta Sindhu or Saptapunyanadi, the Ganges, Yamuna, Sindhu, Sarasvati, Godavari, Narmada and Kaveri rivers are invoked at the start of every ritual. They weave through sacred narratives about gods, sages and heroes and define the physical, spiritual and cultural landscape of Bharatavarsha.