Said I not unto thee - This was implied in what he had said about the resurrection of her brother, John 11:23-25. There would be a manifestation of the glory of God in raising him up which she would be permitted, with all others, to behold.
The glory of God - The power and goodness displayed in the resurrection. It is probable that Martha did not really expect that Jesus would raise him up, but supposed that he went there merely to see the corpse. Hence, when he directed them to take away the stone, she suggested that by that time the body was offensive.