The Hindu festival that turned deadly in northern India on Wednesday is a religious gathering with deep spiritual meaning for devotees who come by the millions to take a cleansing dip in waters they consider sacred.

Millions of devout Hindus thronged the northern Indian city of Prayagraj on Thursday for the Maha Kumbh festival, a day after dozens died in a stampede on the most auspicious day of the six-week event.

Millions of Hindus are gathering in a northern Indian city for the Maha Kumbh festival, the world’s largest religious congregation.