‏البيوع : Hadeeth No:3640 Ibn Abbas (Allaah be pleased with them) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: He who buys foodgrain should not sell it until he has taken possession of it....

‏السلام : Hadeeth No:5374 Abu Huraira reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: The rider should first greet the pedestrian, and the pedestrian the one who is seated and a small group should greet a larger group (with as-Salam-u-'Alaikum)....