Daniel 5:24 - Albert Barnes' Notes on the Bible

Then was the part of the hand sent from him - To wit, the fingers. See Daniel 5:5. The sense is, that when it was fully perceived that Belshazzar was not disposed to learn that there was a God in heaven; when he refused to profit by the solemn dispensations which had occurred in respect to his predecessor; when his own heart was lifted up with pride, and when he had gone even farther than his predecessors had done by the sacrilegious use of the vessels of the temple, thus showing special contempt for the God of heaven, then appeared the mysterious handwriting on the wall. It was then an appropriate time for the Most High God, who had been thus contemned and insulted, to come forth and rebuke the proud and impious monarch.