What is called the sorrow of bihar?

The nom de plume "The Sorrow of Bihar" refers to the Kosi (also spelt Koshi) river, one of the largest tributaries of the Ganges, which runs between Nepal and India.
The nom de plume "The Sorrow of Bihar" refers to the Kosi (also spelt Koshi) river, one of the largest tributaries of the Ganges, which runs between Nepal and India.