´It was narrated that Tawus said:` "I heard Ibn 'Abbas say: 'As for that which the Messenger of Allah forbade, (it is) selling before taking possession of food."'
Hadith Referenceسنن نسائي / كتاب البيوع / 4603
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:حسن
Hadith Takhrij«انظر حدیث رقم: 4601 (صحیح)»
Brief Explanation
1؎: The ruling applies not only to grain itself, but also to other items that are transferred, measured, and weighed in the same manner as grain. This is, in fact, the opinion of Ibn Abbas radi Allahu anhuma himself; see the next narration.