From Malik bin Aws bin Hadathan that he said: "I once said: 'Who can change some Dirham?' So Talhah bin 'Ubaidullah - and he was with 'Umar bin Al-Khattab - said: "Leave your gold with us, then return to us when our servant comes and we will give you your silver." 'Umar bin Al-Khattab said: "No! By Allah! Either give him his silver or return his gold to him. Indeed the Messenger of Allah (ﷺ) said: 'Silver for gold is Riba, except for hand to hand; and wheat for wheat is Riba except for hand to hand; and barley for barley is Riba except hand to hand; and dried-dates for dried-dates is Riba except for hand to hand.'" [Abu 'Eisa said:] This Hadith is Hasan Sahih. This is acted upon according to the people of knowledge. And the meaning of Ha' Wa Ha' is hand to hand.
حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا اللَّيْثُ، عَنِ ابْنِ شِهَابٍ، عَنْ مَالِكِ بْنِ أَوْسِ بْنِ الْحَدَثَانِ، أَنَّهُ قَالَ أَقْبَلْتُ أَقُولُ مَنْ يَصْطَرِفُ الدَّرَاهِمَ فَقَالَ طَلْحَةُ بْنُ عُبَيْدِ اللَّهِ وَهُوَ عِنْدَ عُمَرَ بْنِ الْخَطَّابِ أَرِنَا ذَهَبَكَ ثُمَّ ائْتِنَا إِذَا جَاءَ خَادِمُنَا نُعْطِكَ وَرِقَكَ . فَقَالَ عُمَرُ كَلاَّ وَاللَّهِ لَتُعْطِيَنَّهُ وَرِقَهُ أَوْ لَتَرُدَّنَّ إِلَيْهِ ذَهَبَهُ فَإِنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " الْوَرِقُ بِالذَّهَبِ رِبًا إِلاَّ هَاءَ وَهَاءَ وَالْبُرُّ بِالْبُرِّ رِبًا إِلاَّ هَاءَ وَهَاءَ وَالشَّعِيرُ بِالشَّعِيرِ رِبًا إِلاَّ هَاءَ وَهَاءَ وَالتَّمْرُ بِالتَّمْرِ رِبًا إِلاَّ هَاءَ وَهَاءَ " . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ . وَالْعَمَلُ عَلَى هَذَا عِنْدَ أَهْلِ الْعِلْمِ . وَمَعْنَى قَوْلِهِ " إِلاَّ هَاءَ وَهَاءَ " يَقُولُ يَدًا بِيَدٍ .
Tirmizi
The Book on Business • Hadith 1250