The origin of Biji 4 is not documented, and no confirmed speaker, show or recording date is attached to the clip. It circulates online as a numbered WhatsApp audio file, with its Bengali script title suggesting it was part of a small shared set. Like many forwarded voice clips, it spread through group chats and soundboards rather than an official release. Its short length and numbered name have kept it in use as a disposable reaction sound, easy to save, rename and reuse across different conversations and edits.