ATTRACTIONS OF THE WORLD H 458 "The Prophet, praise and peace be upon him, had sent Abu Ubaidah, the son of Jarrah to Bahrain to collect the poll-tax and he had returned from Bahrain with the money. The Ansar heard the news when they gathered together for the morning prayers with the Prophet, praise and peace be upon him. After the prayer had finished and the Prophet, praise and peace be upon him, was about to leave they presented themselves before him. When he saw them, he smiled and said: 'I think you must have heard that Abu Ubaidah has returned from Bahrain with something.' They replied: 'That is so, O Messenger of Allah, praise and peace be upon him.' The Prophet, praise and peace be upon him, said: 'Be happy, and hope for that which will please you. It is not poverty that I fear for you. What I fear for you is that the world is expanded for you as it was for the people before you, and you will compete as they competed, then it will destroy you as it destroyed them.'" R 458 Bukhari and Muslim with a chain up to Amr, the son of Auf Ansari who related this hadith
456- عن عمرو بن عوف الأنصاري رضي الله عنه : أنَّ رسولَ الله صلى الله عليه وآله وسلم بَعَثَ أَبَا عبيدة بنَ الجَرَّاح رضي الله عنه إِلَى الْبَحْرَيْنِ يَأتِي بِجِزْيَتِهَا ، فَقَدِمَ بمَالٍ مِنَ الْبَحْرَيْنِ ، فَسَمِعَتِ الأَنْصَارُ بقُدُومِ أَبي عُبيْدَةَ ، فَوَافَوْا صَلاَةَ الفَجْرِ مَعَ رسولِ الله صلى الله عليه وآله وسلم ، فَلَمَّا صَلَّى رسولُ الله صلى الله عليه وآله وسلم ، انْصَرفَ ، فَتَعَرَّضُوا لَهُ ، فَتَبَسَّمَ رسولُ الله صلى الله عليه وآله وسلم حِيْنَ رَآهُمْ ، ثُمَّ قَالَ: "أظُنُّكُمْ سَمعتُمْ أنَّ أَبَا عُبَيْدَةَ قَدِمَ بِشَيْءٍ مِنَ الْبَحْرَيْنِ ؟" فقالوا : أجل ، يَا رسول الله، فقال : "أبْشِرُوا وَأَمِّلْوا مَا يَسُرُّكُمْ، فَوالله مَا الفَقْرَ أخْشَى عَلَيْكُمْ ، وَلكِنِّي أخْشَى أنْ تُبْسَط الدُّنْيَا عَلَيْكُمْ كَمَا بُسِطَتْ عَلَى مَنْ كَانَ قَبْلَكُمْ ، فَتَنَافَسُوهَا كَمَا تَنَافَسُوهَا ، فَتُهْلِكَكُمْ كَمَا أهْلَكَتْهُمْ" متفقٌ عَلَيْهِ .