Sunan al-Nasa'i The Book of Financial Transactions al-Laith bin Sa'd الليث بن سعد Fadala bin 'Ubaid bin Naqid Hnsh bin 'Abdullah حنش بن عبد الله ويقال Khalid bin Abi 'Imran خالد بن أبي عمران Qutayba bin Sa'id bin Jamil قتيبة بن سعيد بن جميل Sa'id bin Yazid al-Humayri سعيد بن يزيد الحميري القتباني “O people, you have invented kinds of transactions, I do not know what they are, but make sure it is gold for gold, of the same weight, or silver for silver, of the same weight. There is nothing wrong with selling silver for gold, hand to hand, giving more silver than gold, but no credit is allowed. When you sell wheat for wheat and barley for barley, it should be measure for measure, but there is nothing wrong with selling barley for wheat, hand to hand, giving more barley than wheat, but no credit is allowed. And when you sell dates for dates, it should be measure for measure” And he mentioned salt, “measure for measure, and whoever gives more or asks for more has engaged in Riba. https://parallelquran.com/hadith/sunan-al-nasai-4573/ Sunan Abi Dawud Commercial Transactions (Kitab Al-Buyu) al-Laith bin Sa'd الليث بن سعد Fadala bin 'Ubaid bin Naqid Hnsh bin 'Abdullah حنش بن عبد الله ويقال Khalid bin Abi 'Imran خالد بن أبي عمران Qutayba bin Sa'id bin Jamil قتيبة بن سعيد بن جميل Sa'id bin Yazid al-Humayri سعيد بن يزيد الحميري القتباني Sahih The Prophet (ﷺ) was brought a necklace in which there were gold and pearls. (The narrators AbuBakr and (Ahmad) Ibn Mani’ said: The pearls were set with gold in it, and a man bought it for nine or seven dinars.) The Prophet (ﷺ) said: (It must not be sold) till the contents are considered separately. The narrator said: He returned it till the contents were considered separately. The narrator Ibn Asa said: By this I intended trade. Abu Dawud said: The word hijarah (stone) was recorded in his note-book before, but he changed it and narrated tijarah (trade). https://parallelquran.com/hadith/sunan-abi-dawud-3351/ Jami' al-Tirmidhi The Book on Business al-Laith bin Sa'd الليث بن سعد Fadala bin 'Ubaid bin Naqid Hnsh bin 'Abdullah حنش بن عبد الله ويقال Khalid bin Abi 'Imran خالد بن أبي عمران Qutayba bin Sa'id bin Jamil قتيبة بن سعيد بن جميل Sa'id bin Yazid al-Humayri سعيد بن يزيد الحميري القتباني From his father, from his grandfather, that the Messenger of Allah (ﷺ) said: “Both the buyer and the seller retain the option as long as they did not separate, unless they agreed to making it optional. And it is not lawful for him to separate from his companion, fearing that he will change his mind.” This Hadith is Hasan and this means separating from him after the sale, fearing that he will change his mind. And if the separation referred to speech, and there was no option left for him after the sale, then this Hadith would be meaningless, since he (ﷺ) said: “And it is not lawful for him to separate from his companion, fearing that he will change his mind.” https://parallelquran.com/hadith/jami-al-tirmidhi-1251/