Listen to Oi Mahasindhur Opar Theke online. Oi Mahasindhur Opar Theke is a Bengali language song and is sung by Riddhi Bandyopadhyay. Oi Mahasindhur Opar Theke, from the album Oi Mahasindhur Opar Theke, was released in the year 2015. The duration of the song is 5:40. Download Bengali songs online from JioSaavn.