Sahih al-Bukhari Book 34, Hadith 65
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."
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, "No deal is settled and finalized unless the buyer and the seller separate, except if the deal is optional (whereby the validity of the bargain depends on the stipulations agreed upon).