Yusuf bin 'Isa bin Dinar يوسف بن عيسى بن دينار الزهري · The Book on Business

That the Messenger of Allah (ﷺ) said: "Both the buyer and the seller retain the option as long as they have not separated. If they spoke the truth and clarified (any defects or conditions), then they would be blessed in their sale, and if they hid something and lied then their sale would be deprived of blessings." And this is a Sahih Hadith. This is how it was reported from Abu Barzah Al-Aslami, that two men came disputing to him…