Amr bin Auf, who was an ally of Banu Amir bin Luwayy (and he was one amongst them) who participated in Badr along with Allahs Messenger ﷺ , reported that Allahs Messenger ﷺ sent Abu Ubaida bin Jarrah to Bahrain for collecting Jizya and Allahs Messenger ﷺ had made a truce with the people of Bahrain and had appointed Ala bin Hadrami and Abu Ubaida (for this purpose). They came with wealth from Bahrain and the Ansar heard about the arrival of Abu Ubaida and they had observed the dawn prayer along with Allahs Messenger ﷺ , and when Allahs Messenger ﷺ had finished the prayer they (the Ansar) came before him and Allahs Messenger ﷺ smiled as he saw them and then said: I think you have heard about the arrival of Abu Ubaida with goods from Bahrain. They said: Allahs Messenger yes, it is so. Thereupon he said: Be happy and be hopeful of that what gives you delight. By Allah, it is not the poverty about which I fear in regard to you but I am afraid in your case that (the worldly) riches may be given to you as were given to those who had gone before you and you begin to vie with one another for them as they vied for them, and these may destroy you as these destroyed them.