OTHELLO: How shall I murder him, Iago?
IAGO: Did you perceive how he laughed at his vice?
OTHELLO: O Iago!
IAGO: And did you see the handkerchief?
– William Shakespeare
Othello, Act 4, Scene 1. Othello is in a jealous rage after seeing Bianca throw Desdemona’s handkerchief to Cassio. So much so that he wants to murder his former lieutenant. Iago continues to manipulate and deceive Othello into believing that the handkerchief means Cassio and Desdemona are having an affair.