Once he's back at home, Macbeth eventually decides that he doesn't want to move forward with Duncan's murder. However, his wife talks him back into it. At this point, he joins in her plotting, asking,
Will it not be received,
When we have marked with blood those sleepy two
Of his own chamber and used their very daggers,
That they have done 't? (1.7.85–88)
In other words, he asks who would possibly fail to believe them when they've used the daggers belonging to Duncan's chamberlains to kill the king as well as smeared the chamberlains with Duncan's blood. The implication is that none will question them, the great Macbeths. Who would possibly believe that these heretofore loyal subjects, who have just received such honors from the king, would do anything other than their best to keep him safe? None. It is villainous thinking from a newly-villainous man. To this same end, he says,
I am settled and bend up
Each corporal agent to this terrible feat.
Away, and mock the time with fairest show.
(The entire section contains 2 answers and 625 words.)