Musannaf Ibn Abi Shayba 13:2461

Abu Bakr narrated to us, he said: Ibn ‘Uyaynah narrated to us, from Sufyan, from Ibn Tawus, from his father, who said: "The option (to rescind a sale) was only after the sale." He said: "And the Messenger of Allah (ﷺ) sold to a man from the Bedouins, and he gave him the option after the sale."