Read the excerpt from Act III, scene i of Romeo and Juliet.
Benvolio: I pray thee, good Mercutio, let’s retire:
The day is hot, the Capulets abroad,
And, if we meet, we shall not ’scape a brawl;
For now, these hot days, is the mad blood stirring.
basically benvolio is saying this because of the feud between there family but its hot as outside so he's saying next time you won't escape from the fight