(3) باب السَّلَمِ إِلَى مَنْ لَيْسَ عِنْدَهُ أَصْلٌ
Narrated Muhammad bin Abi Al-Mujalid:
as above (446) and said, "We used to pay them in advance for wheat and barley (to be delivered later). Narrated Ash-Shaibani--"And also for oil."Narrated Ash-Shaibani:who said "We used to pay in advance for wheat barley and dried grapes."
Reference: Sahih al-Bukhari 2245
In-book reference: Book 35, Hadith 8
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 35, Hadith 448