سنن ابن ماجه

It was narrated from ‘Abdullah bin ‘Amr bin ‘As that the Messenger of Allah (ﷺ) said: “When the treasures of Persia and Rome are opened for you, what kind of people will you be?” ‘Abdur-Rahman bin ‘Awf said: “We will say what Allah has commanded us to say.” The Messenger of Allah (ﷺ) said: “Or something other than that. You will compete with one another, then you will envy one another, then you will turn your backs on one another, then you will hate one another, or something like that. Then you will go to the poor among the Muhajirun and appoint some of them as leaders of others.”