The dominant device used in Macbeth doth murdered sleep; the innocent sleep is

Explanation

In the line "Macbeth doth murder sleep; the innocent sleep," Shakespeare personifies sleep by treating it as something that can be "murdered." and as something that can be innocent or guilty. Personification is a literary device where human qualities are given to non-human things. Here, sleep is depicted as an innocent entity that Macbeth has killed by committing murder, symbolizing his guilt and unrest.