Iago and Roderigo are outside of Brabantio's balcony telling him his daughter is with Othello.
Awake! What ho, Brabantio! Thieves, thieves! Look to your house, your daughter, and your bags! Thieves, thieves!
Roderigo came to confront Othello because he believed he had used magic to kidnap and and seduce his daughter.
Keep up your bright swords, for the dew will rust them.
O, thou foul thief, where hast thou stowed my daughter? Damned as thou art, thou hast enchanted her!
Othello, Iago, Roderigo, Cassio, and Brabantio go to the duke to settle the dispute.
what, in your own part, can you say to this?
They call on Desdemona to hear her testament of what happened.
...so much I challenge that I may profess due to the moor my lord.
Iago gives Roderigo a pep talk about how even though Desdemona loves Othello; if he gets rich she will come to him.
I will incontinently drown myself.
If thou dost, I shall never love thee after. Why thou silly gentleman!...put money in thy purse.
Iago gives a monologue about his plan to ruin Othello.
He thinks any man who seems honest is honest. People like that are easy to manipulate. So it’s all decided. I’ve worked it out. With a little help from the devil, I’ll bring this monstrous plan to success.