Hear the song written on a sinners buttocks in..

[Nearly Sane]

Hieronymus Bosch's painting The Garden of Earthly Delight.

Of course

https://www.openculture.com/2024/05/hear-the-song-written-on-a-sinners-buttock-in-hieronymus-boschs-painting-the-garden-of-earthly-delights.html