Key Passage

Then from his presence the hand was sent, and this writing was inscribed. And this is the writing that was inscribed: Mene, Mene, Tekel, and Parsin. This is the interpretation of the matter: Mene, God has numbered the days of your kingdom and brought it to an end; Tekel, you have been weighed in the balances and found wanting; Peres, your kingdom is divided and given to the Medes and Persians.

Daniel 5:24-28 (ESV)