‘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