John Gill Commentary Mark 10:26

"And they were astonished exceedingly, saying unto him, Then who can be saved?" — Mark 10:26 (ASV)

And they were astonished out of measure
They were still more amazed, their surprise increased exceedingly upon our Lord's using the above comparison; which, in their apprehension, showed, that it was utterly impossible for a rich man to enter into the kingdom of God; and they expressed their astonishment,

saying, among themselves, who then can be saved ?
in the Messiah's kingdom, if rich men are not? (See Gill on Matthew 19:25). The Persic version renders it, "how can this man be saved?" as if the words had a particular respect to the young man, that had great possessions, and was gone away sorrowful.