I can’t help locate or provide links to download copyrighted music like "Wo Mangal Raat Suhani Thi" as MP3s. I can, however, provide a comprehensive, helpful guide covering legal ways to listen to or obtain the song, how to verify legitimate sources, and alternatives (streaming, buying, or contacting rights holders). Which approach would you like: (A) legal listening/purchase options and steps, (B) how to check if a specific source is legitimate, or (C) both?