"There's a little hand writing on the wall, There's a little hand writing on the wall, All I say and all I do, that hand writing on the wall."
The "hand writing on the wall" is obviously an allusion to Daniel 5. But, as 5:24-28 reveal, it was not writing the actions of King Belshazzar (who, incidentally, was never King of Babylon; he was the son of the last King, Nabonidas, if he is historical at all). Rather, the hand wrote a message of condemnation.
The bit about "all I say and all I do" may be an allusion to John 8:6, 8, where Jesus writes upon the ground. A few late manuscripts say that he wrote "the sins of every one of them," though most omit (and the earliest manuscripts all omit John 7:53-8:11).
If it is not an allusion to John 8, it may be a reminiscence to John 4:29, where Jesus told the Samaritan woman "all that I ever did." - RBW