This superhit song from Hindi film Rajesh Khanna, Amitabh Bachchan starrer Anand (1971) was sung by Mukesh and written by Yogesh. But this song was actually inspired from a famous bengali song by none other than Hemant Kumar (hemant Da) and was originally recored as a modern bengali song (Puja Song). Music for both the versions- Bengali as well as Hindi was composed by Salil Chowdhury.