Haraprasad Shastri is credited with the discovery of the first collection of poems in the Bengali language, known as "Charyapada." The Charyapada is a collection of Buddhist mystic songs composed between the 8th and 12th centuries. Haraprasad Shastri, a renowned Bengali scholar and historian, extensively studied ancient Bengali literature and manuscripts and was the first to recognize the significance of the Charyapada as the earliest known collection of Bengali poetry. His research and efforts in deciphering and popularizing the Charyapada played a crucial role in the recognition and preservation of this important literary treasure.