In "Othello", Iago warns, "O! Beware, my lord, of jealousy", it is this creature
[DOC] [TLE] Othello Quotes by LitCharts | From the creators of SparkNotes [PAR] Find the quotes you need in William Shakespeare's Othello, sortable by theme, 
character, ... "O, beware, my lord, of jealousy!