Answer:
sarcasm
Step-by-step explanation:
According to the given quote, Lennox says that Macbeth has borne all things well.
The literary device most likely used in this excerpt is sarcasm. This is because, Macbeth struggled throughout most of the book to control situations around him and even had to resort to murder on more than one occasion and definitely did not bear "all things well".
Therefore, Lennox's words were most likely sarcasm.