John Lightfoot on John 5:27

[To execute judgment also, because he is the Son of man.] Daniel 7:13: "Behold, one like the Son of man came with the clouds of heaven, and came to the Ancient of days...and there was given him dominion, and glory," &c. To this our blessed Saviour seems to have respect in these words, as the thing itself plainly shews. R. Solomon upon the place: "One like the Son of man, this is the King, the Messiah." R. Saadias, this is the Messiah our righteousness. When our Saviour declared before the Sanhedrim, "Ye shall see the Son of man sitting on the right hand of power, and coming in the clouds"; they all said, "Art thou Christ, the Son of the blessed God?" by which they imply, that the 'Son of God' and 'Christ' are convertible terms: as also are 'Christ' and the Son of man. And it plainly shews that their eyes were intent upon this place: "Art thou that Son of man spoken of in Daniel, who is the Son of God, the Messiah?" So did Christ in these words look that way.