But to sit on my right hand and on my left hand is not mine to give; but it shall be given to them for whom it is prepared.
All Commentaries on Mark 10:40 Go To Mark 10
Augustine of Hippo
AD 430
Matthew has expressed that this was said not by themselves, but by their mother, since she brought their wishes to the Lord; wherefore Mark briefly implies rather that they themselves, rather than their mother, had used the words.
Then the Lord both according to Mark, and to Matthew, answered them rather than their mother. For it goes on: “But Jesus said unto them,Ye know not what ye ask.”