“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.”
Sunan Ibn Majah Book 36, Hadith 71
← Previous Hadith “The Messenger of Allah (ﷺ) stood up and addressed the people saying: ‘No, by Allah, I do not fear for you, O people, but I fear the attractions of this world that Allah brings forth for you.’ A man said to him: ‘O Messenger of Allah(ﷺ), does good bring forth evil?’ The Messenger of Allah (ﷺ) remained silent for a while, then he said: ‘What did you say?’ He said: ‘I said, does good bring forth evil?’ The Messenger of Allah (ﷺ) said: ‘Good does not bring forth anything but good, but is it really good? Everything that grows on the banks of a stream may either kill if overeaten or (at least) make the animals sick, except if an animal eats its fill of Khadir* and then faces the sun, and then defecates and urinates, chews the cud and then returns to graze again. Whoever takes wealth in a lawful manner, it will be blessed for him, but whoever takes it in an unlawful manner, his likeness is that of one who eats and it never satisfied.’”

Sunan Ibn Majah Book 36, Hadith 70 Next Hadith → ‘I think you have heard that Abu ‘Ubaidah has brought something from Bahrain?’ They said: ‘Yes, O Messenger of Allah.’ He said: ‘Be of good cheer and hope for that which will make you happy. By Allah, I do not fear poverty for you, rather I fear that you will enjoy ease and plenty like those who came before you, and that you will compete with one another as they did, and you will be destroyed as they were.’”

Sunan Ibn Majah Book 36, Hadith 72