Chapter 35: Sales in which a Price is paid for Goods to be Delivered Later (As-Salam)
Narrated Shu 'ba: Muhammad or 'Abdullah bin Abu Al-Mujalid said, "Abdullah bin Shaddad and Abu Burda differed
regarding As-Salam, so they sent me to Ibn Abi 'Aufa and I asked him about it. He replied, 'In the
lifetime of Allah' s Messenger (ﷺ), Abu Bakr and 'Umar, we used to pay in advance the prices of wheat,
barley, dried grapes and dates to be delivered later. I also asked Ibn Abza and he, too, replied as
above.' "
Sahih al-Bukhari 2243