Listen to Qasam Khao Tum Ek Baar online. Qasam Khao Tum Ek Baar is a Hindi language song and is sung by Asha Bhosle and Kishore Kumar. Qasam Khao Tum Ek Baar, from the album Madhosh, was released in the year 1974. The duration of the song is 4:42. Download Hindi songs online from JioSaavn.