(46) باب إِذَا كَانَ الْبَائِعُ بِالْخِيَارِ، هَلْ يَجُوزُ الْبَيْعُ
Narrated Ibn `Umar:
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).
Reference: Sahih al-Bukhari 2113
In-book reference: Book 34, Hadith 66
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 34, Hadith 326