Sahih al-Bukhari 2079

Sulayman ibn Harb narrated to us: Shuaba narrated to us, from Qatada, from Salih Abu al-Khalil, from Abd Allah ibn al-Harith, who traced it back to Hakim ibn Hizam, may Allah be pleased with him, who said: The Messenger of Allah, peace and blessings be upon him, said: “The two parties to a sale have the option as long as they have not separated—or he said, until they separate. If they are truthful and make matters clear, their sale will be blessed for them; but if they conceal and lie, the blessing of their sale will be erased.”