Although Daniel 5:25-28 interprets this legendary handwriting on the wall as, to paraphrase, "God has numbered (mene) your kingdom, weighed (mene) it and found it wanting (tekel - could be understood in Hebrew as found to be light-weight), and divided (u-pharshin) it among the Medians and the Persians," no one can be sure what was originally intended. The consensus is that both mene and tekel are Aramaic renderings of the Hebrew weight units mina and shekel; but upharsin could well refer to a yet smaller unit and also serve as a pun on the name "Persia" which to a native at the time was "Parsa."
(courtesy of amug.org)