Hakim bin Hizam (may Allah be pleased with him) says that the Messenger of Allah (peace and blessings of Allah be upon him) said: "The seller and the buyer have the option (to cancel or confirm the sale) as long as they do not separate. 1 Both have the right to keep the sale or to annul it. If both speak the truth and make clear the good and bad aspects of the goods, there will be blessing in their sale. But if they conceal defects and tell lies, the blessing of their sale will be erased." Imam Tirmidhi says:
1- This hadith is authentic.
2- Similarly, it is also narrated from Abu Barzah Aslami that two men, after selling a horse, brought their case to him while they were in a boat. Abu Barzah said: "I do not think that you both have separated, and the Messenger of Allah (peace and blessings of Allah be upon him) said: 'The seller and the buyer have the option as long as they do not separate (from the gathering).' "
3- Some scholars among the people of Kufa and others have held the view that separation is by statement, and this is also the saying of Sufyan Thawri, and similarly it is narrated from Malik bin Anas.
4- And Ibn Mubarak said: "How can I reject this view when an authentic hadith has been reported from the Prophet (peace and blessings of Allah be upon him)?"
5- And he has declared it strong. The meaning of the saying of the Prophet (peace and blessings of Allah be upon him) «إلا بيع الخيار» is that after the sale becomes binding, the seller gives the buyer the option, then when the buyer chooses the sale, after that he will not have the option to annul the sale, even if they have not separated. Similarly, Shafi'i and others have interpreted it.
6- And the view of those who say that separation is physical (separation of bodies) is supported by the hadith of Abdullah bin Amr, which he narrates from the Prophet (peace and blessings of Allah be upon him) (which is coming ahead).