"I heard Abu Saeed Al-Khudri say: 'A Dirham for a Dirham and a Dinar for a Dinar.' So I said: 'I heard Ibn 'Abbas say something other than that.' He said: 'But I met Ibn 'Abbas and said: "Tell me about what you say concerning exchange is it something that you heard from the Messenger of Allah (ﷺ) or something that You found in the Book of Allah?" He said: "I did not find it in the Book of Allah, and I did not hear it from the Messenger of Allah; rather Usamah bin Zaid told me that the Messenger of Allah (ﷺ) said: "Usury is only in credit."[1]
"I heard him meaning Ibn 'Abbas allowing exchange (of Dirhams for Dirham etc., if extra was given) and that was narrated from him. Then I heard that he has taken back this opinion. I met him in Makkah and said: 'I heard that you had taken back (your opinion).' He said: 'Yes. That was just my own opinion, but Abu Sa'eed narrated from the Messenger of Allah (ﷺ) that he forbade exchange (of like items if extra is given)."'
"I heard 'Umar say: "The Messenger of Allah (ﷺ), said: 'Gold for silver is usury, unless it is exchanged on the spot."' (Sahih) Abu Bakr bin Abu-Shaibah said: "I heard sufyan saying: 'Gold for silver." memorize (this).
"I came saying. 'Who will exchange Dirham?' Talhah bin 'Ubaidullah, who was with 'Umar bin Khattab, said: 'Show us your gold, then come to us; when our treasure comes, we will give you your silver.' 'Umar said: 'No, by Allah, you will give him silver (now), or give him back his gold, for the Messenger of Allah (ﷺ) said: "Silver for gold is usury, unless it is exchanged on the spot."'
'The Messenger of Allah (ﷺ) said: 'Dinar for Dinar, Dirham for Dirham, with no increase between them. Whoever has need of silver, let him trade gold for it, and whoever has need of gold, let him trade silver for it, and let the transaction be done on the spot."'
"I used to sell camels, and I used to buy gold for silver and silver for gold, Dinar for Dirham and Dirham for Dinar. I asked the Prophet (ﷺ) about that, and he said: 'If you take one of them and give the other, then you and your companion should not separate until everything is clear (i.e., the exchange is completed).’” (Hasan) Another chain with similar wording.
Zaid, Abu 'Ayyash, the freed slave of Bani Zuhrah, told him that he asked Sa'd bin Abu Waqqas about buying wheat with barley. Sa'd said to him: "Which of them is better?" He said: "Wheat." He told him not to do that and said: "I heard the Messenger of Allah (ﷺ) being asked about buying fresh dates with dried dates, and he said: 'Do fresh dates decrease in weight when they become dry?' They said: 'Yes.' So he told them not to do that."
حَدَّثَنَا مُحَمَّدُ بْنُ رُمْحٍ، أَنْبَأَنَا اللَّيْثُ بْنُ سَعْدٍ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، قَالَ نَهَى رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ عَنِ الْمُزَابَنَةِ . وَالْمُزَابَنَةُ أَنْ يَبِيعَ الرَّجُلُ تَمْرَ حَائِطِهِ إِنْ كَانَتْ نَخْلاً بِتَمْرٍ كَيْلاً وَإِنْ كَانَتْ كَرْمًا أَنْ يَبِيعَهُ بِزَبِيبٍ كَيْلاً وَإِنْ كَانَتْ زَرْعًا أَنْ يَبِيعَهُ بِكَيْلِ طَعَامٍ نَهَى عَنْ ذَلِكَ كُلِّهِ .
"The Messenger of Allah (ﷺ) forbade the Muzabanah. The Muzdbanah means when a man sells the dates of his grove when they are still on the tree, for a measure of dty dates;[2] or, if it is grapes, he sells them when they are still on the vine, for a measure of raisins; or if it is a crop, he sells it for food, estimating the amount (of the crop in the field). He forbade all of these things."