Not quite exactly what you’re asking for but in Pink Floyd’s “great gig in the sky” the woman’s voice near the end does NOT say “if you hear whispering, you’re dying”, nor is she herself whispering. The line is “I never said I was afraid of dying”. This was not some spooky thing PF put into their song to trip stoners out, but part of a series of responses to questions that they asked people when recording the rest of the clips used throughout the album.