Luke 4:40

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 of many, saying, Thou art the Son of God. And rebuking them, he suffered them not to speak, because they knew that he was the Christ.

And when the sun was setting... Such an expression as this, compared with the parallels (Matthew 8:16; Mark 1:32), proves the independence of the synoptic narrators. Note:

<MONO>Matthew: When even had come.

Mark: At even, when the sun did set.

Luke: When the sun was setting.MONO>

Suffered them not to speak ... The reason here given by Luke for such a prohibition, the demon's knowledge that he was the Christ, suggests other reasons cited elsewhere in the New Testament. Christ did not wish to permit the Pharisees an excuse to allege any collusion on his part with demons; and it was premature, at that time, for Jesus to declare his Messiahship, except by implication as he did in Nazareth.