Caesar ignored the soothsayer’s warning to “beware the ides of March” and on March 15th in 44 BCE was assassinated. Cassius was among the attackers. Caesar knew that there was something suspicious about Cassius. He had remarked to Antony:
Let me have men about me that are fat;
Sleek-headed men and such as sleep o’ nights:
Yond Cassius has a lean and hungry look;
He thinks too much: such men are dangerous.
Be very wary of people with lean and hungry looks who think too much.
[Here’s Act 1, Scene 2 of The Life and Death of Julius Caesar by William Shakespeare.]
POSTSCRIPT: All sorts of bad things happen on the ides of March. In 1876 on the ides of March, test cricket was born with a match between England and Australia.