Abu Minhal reported: My partner sold silver to be paid in the (Hajj) season or (in the days of) Hajj. He (my partner) came to me and informed me, and I said to him: Such transaction is not desirable. He said: I sold it in the market (on loan) but nobody objected to this. I went to al-Bara' bin 'Azib (RA) and asked him, and he said: Allah's Apostle ( صلی اللہ علیہ وسلم ) came to Madinah and we made such transaction, whereupon he said: In case the payment is made on the spot, there is no harm in it, and in case (it is 'sold) on loan, it is usury. You better go to Zaid bin Arqam, for he is a greater trader than I; so I went to him and asked him, and he said like it.

Habib reported that he heard Abu Minhal as saying: I asked al-Bara' bin Azib (RA) about the exchange of (gold for silver or vice versa), whereupon he said: you better ask Zaid bin Arqam for he knows more than I. So I asked Zaid but he said: You better ask al-Bara' for he knows more than I. Then both of them said: Allah's Messenger ( صلی اللہ علیہ وسلم ) forbade the sale of silver for gold when payment is to be made in future.