Listen to Tumari Kasam Tum Bahut online. Tumari Kasam Tum Bahut is a Hindi language song and is sung by Lata Mangeshkar and Shankar-Jaikishan. Tumari Kasam Tum Bahut, from the album Gaban, was released in the year 1966. The duration of the song is 3:24. Download Hindi songs online from JioSaavn.