‏البيوع : Hadeeth No:3632 Anas b. Malik (Allaah be pleased with him) reported: We were forbidden that a townsman should sell for a man of the desert, even if he is his brother or father....

‏الفتن وأشراط الساعة‏ : Hadeeth No:6891 Usama reported that Allaah's Messenger (sallAllaahu alayhi wa sallam) climbed up a battlement amongst the battlements of Medina and then said: You do not see what I am seeing and I am seeing the places of turmoil between your houses as tile places of rainfall....