Answer:
In the book of Daniel the king of Babylon, Nebuchadnezzar the second, had one son called Belshazzar. Nebuchadnezzar had the dream about the statue:
Head of gold - Babylon
Breast and arms of silver - Medo and Persia
Stomach and thighs of brass (or bronze) - Greece
Legs of iron and feet of part clay and part iron - Rome
Rock - God's kingdom
And Belshazzar saw God write on the wall during his feast which was "MENE MENE TEKEL UPHARSIN".