Sahih al-Bukhari Book 34, Hadith 64
Allah's Messenger (ﷺ) said, "Both the buyer and the seller have the option of canceling or confirming a
bargain unless they separate, or the sale is optional." (See Hadith No.320).
The Prophet (ﷺ) said, "The buyer and the seller have the option of canceling or confirming the bargain unless they separate, and if they spoke the truth and made clear the defects of the goods, them they would be blessed in their bargain, and if they told lies and hid some facts, their bargain would be deprived of Allah's blessings."
Allah's Messenger (ﷺ) said, "Both the buyer and the seller have the option of canceling or confirming the bargain, as long as they are still together; and unless they separate or one of them gives the other the option of keeping or returning the things and a decision is concluded then, in which case the bargain is considered final. If they separate after the bargain and none of them has rejected it, then the bargain is rendered final."