THE HOLY BIBLE Darby
Notes on Isaiah (Author J. N. Darby)
51:12 man: Enosh, as in ver. 7. This is one of the passages in which its force, as 'mortal man,' is very clear. 'Son of man' in this verse is 'son of Adam.'
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.