‏البيوع : Hadeeth No:3758 Ibn Umar (Allaah be pleased with them) reported that Allaah's Messenger (sallAllaahu alayhi wa sallam) contracted with the people of Khaibar the (trees) on the condition that he would have half the produce in fruits and harvest....

‏السلام : Hadeeth No:5547 Nafi' reported that Ibn 'Urnar used to kill all types of snakes until Abu Lubaba b. 'Abd al-Mundhir Badri reported that Allaah's Messenger (sallAllaahu alayhi wa sallam) had forbidden the killing of the snakes of the houses, and so he abstained from it....