 Khumar has written some famous songs for Hindi films like Shahjahan, Baradari, 'Saaz aur Awaaz', "Love And God" (1986) directed by K. Asif etc.He was indeed closely associated with famed composers like Naushad, a fact not as well-known to many.He wrote all the songs for the film 'Saaz aur Awaaz' produced by Naushad in 1966 and wrote the songs again for the film 'Love and God' in 1986 for which Naushad again composed music.