Thousands of devout Hindus took a dip in the Godavari river to cleanse themselves of their sins during the first major snan (bathing session) of the Kumbh Mela (Pitcher Festival) in Nashik, western India.

Kumbh Mela Nashik
Hindu devotees pray while standing in the Godavari river during the Kumbh Mela, or Pitcher Festival, in NashikDanish Siddiqui/Reuters
Kumbh Mela Nashik
A Hindu devotee slips as others pray while standing in the Godavari riverDanish Siddiqui/Reuters
Kumbh Mela Nashik
A Hindu devotee takes a dip with her daughter in the Godavari riverDanish Siddiqui/Reuters
Kumbh Mela Nashik
A boy cries as he is dipped by his relatives in the Godavari river in NashikDanish Siddiqui/Reuters

The festival has its roots in a Hindu tradition that says the Lord Vishnu battled demons for a golden pot containing the nectar of immortality. During their 12-day fight for possession, four drops of this elixir fell to earth, in the cities of Allahabad, Haridwar, Ujjain and Nasik. Every three years a Kumbh Mela is held at one of these spots. Bathing in the river at these places during this period is considered to cleanse all sins.

More than 2,000 years old, the festival is a meeting point for Hindu 'sadhu' ascetics, some of whom live in forests or Himalayan caves. Some naked and covered in ash, others wrapped in saffron or leopard-print cloth and smoking cannabis pipes, the holy men hold court by fire pits in sprawling camps decorated with coloured neon lights, where they are visited by pilgrims who offer alms and receive blessings.

Kumbh Mela Nashik
A naga sadhu, or naked Hindu holy man, applies ash at his camp before a processionDanish Siddiqui/Reuters
Kumbh Mela Nashik
Naga sadhus wait by their camp before a procession during Kumbh Mela Danish Siddiqui/Reuters
Kumbh Mela Nashik
Sadhus take part in a procession during the Kumbh MelaDanish Siddiqui/Reuters
Kumbh Mela Nashik
A Sadhu, or Hindu holy man, prays on the bank of Godavari riverDanish Siddiqui/Reuters
Kumbh Mela Nashik
A sadhu looks into the camera on the banks of Godavari river during the Kumbh MelaDanish Siddiqui/Reuters

The festival grows in size each time it is held. This partly reflects India's expanding population, but is also seen as evidence that spiritual life is thriving alongside the new-found affluence of a growing middle class.