Sahih al-Bukhari 2112
Book 34: Sales and Trade · Hadith 65
Hadith text
Narrated Ibn `Umar: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
Ibn Umar (رضی اللہ عنہما) bataate hain: Allah ke Rasool ne farmaya: "Donon, khareedne aur bechne wale, ko saudebaazi radd ya poori karne ka ikhtiyaar hai jab tak woh saath hain; aur jab tak woh alag na ho jaayen ya unme se ek doosre ko cheez rakhne ya wapas karne ka ikhtiyaar de aur usi waqt faisla ho jaaye, tab saudebaazi pakki maani jaaegi. Agar woh saudebaazi ke baad alag ho gaye aur kisi ne isse radd nahi kiya, to saudebaazi pakki ho jaayegi."
Sahih al-Bukhari 2112 · Book 34, Hadith 65