The source describes Koshi Bharana as a ritual linked to a special vow, or Mannat. It details a sugarcane canopy, fruit offerings, prasad, and lamps arranged between the evening and morning Arghya.
Fulfilling Special Vows: The Koshi Ritual
Koshi Bharana is a distinctive and deeply honored ritual during Chhath Puja carried out by families who have made a particular vow (Mannat): commonly for the arrival of a child, the healing from a serious disease, or a significant achievement in life.
How It Is Performed
On the night of Sandhya Arghya, families build a canopy from 5 to 7 sugarcane stalks in their courtyard or beside the river. Beneath this canopy, earthen lamps (diyas), fruits, and customary Prasad are placed. The diyas remain lit all night until the morning Usha Arghya, representing the enduring flame of steadfast faith.