Luke 4:34

"Saying, Let us alone; what have we to do with Thee, Thou Jesus of Nazareth? art Thou come to destroy us? I know Thee who Thou art; the Holy One of God. Luke 4:34
Observe,
[1.] The devil is an unclean spirit, his nature directly contrary to that of the pure and holy God, and degenerated from what it was at first.

[2.] This unclean spirit works in the children of men; in the souls of many, as then in men's bodies.
[3.] It is possible that those who are very much under the power and working of Satan may yet be found in the synagogue, among the worshippers of God.
[4.] Even the devils know and believe that Jesus Christ is the Holy One of God, is sent of God, and is a Holy One." 

Matthew Henry