‏البيوع : Hadeeth No:3644 Ibn 'Umar (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 full possession of it....

‏البيوع : Hadeeth No:3737 This hadith has been narrated on the authority of Ayyub and he made an addition in the hadith narrated by Ibn Ulayya in which he said: Ibn Umar abandoned it afterwards and he did not rent it (the land)....