John Gill Commentary Luke 4:34

"Ah! what have we to do with thee, Jesus thou Nazarene? art thou come to destroy us? I know thee who thou art, the Holy One of God." — Luke 4:34 (ASV)

Saying, let us alone
Not that there were more spirits in him than one, as the whole account shows; but he includes the rest of the devils in that country; (See Gill on Mark 1:24).