Charles Ellicott Commentary Luke 4:40-41

"And when the sun was setting, all they that had any sick with divers diseases brought them unto him; and he laid his hands on every one of them, and healed them. And demons also came out from many, crying out, and saying, Thou art the Son of God. And rebuking them, he suffered them not to speak, because they knew that he was the Christ." — Luke 4:40-41 (ASV)

Now when the sun was setting.—See Notes on Matthew 8:16-17. Common to St. Luke and St. Mark are the divers diseases, and the silence imposed on the demoniacs. The words of the demoniacs, Thou art the Son of God, and they knew that He was the Christ, are peculiar to this Gospel.