What does Rosaline tell benvolio that he and Romeo must be mad?

Juliet's mother tells her that she would marry Paris if she has to, but not because she wants to.  At the end of Act 1 Sc. 4, what does Romeo tell Benvolio, foreshadowing future action. He gets really mad and alerts Lord Capulet about the disruption to the party. Mercutio thinks that Romeo went back looking for Rosaline.

Explanation:

The Prince was so angry because the families keep on fighting and distributing people about their fight. Juliet's mother tells her that she would marry Paris if she has to. . At the end of Act 1 Sc. 4, what does Romeo tell Benvolio, foreshadowing future.

Idont get it at all sorry