‏الصيام : Hadeeth No:2435 'A'isha (Allaah be pleased with her) said: The Prophet of Allaah (sallAllaahu alayhi wa sallam) forbade them (his Companions) to observe Saum Wisal out of mercy for them. They said: You (Prophet) yourself observe it. Upon this he said: I am not like you. My Lord feeds me and provides me drink....

‏البيوع : Hadeeth No:3728 Jabir (Allaah be pleased with him) reported Allaah's Prophet (sallAllaahu alayhi wa sallam) forbidding selling of (produce) in advance for two years, and in the narmtion of Ibu Abd Shaiba (the words are):" Selling of the fruits (on the tree) in advance for two years."...