Allah's Messenger (ﷺ) said, "The seller and the buyer have the option of canceling or confirming the deal
unless they separate, or one of them says to the other, 'Choose (i.e. decide to cancel or confirm the
bargain now)." Perhaps he said, 'Or if it is an optional sale.' " Ibn `Umar, Shuraih, Ash-Shu`bi, Tawus,
Ata, and Ibn Abu Mulaika agree upon this judgment.
Sahih al-Bukhari Book 34, Hadith 62
Yahya related to me from Malik that he had heard that Abd ar-
Rahman ibn Abi Bakr was visiting A'isha, the wife of the Prophet, may
AIIah bless him and grant him peace, on the day that Sad ibn Abi
Waqqas died, and he asked for some water to do wudu. A'isha said to
him, ''Abd ar-Rahman! Perform your wudu fully, for I heard the
Messenger of Allah, may Allah bless him and grant him peace, say, 'Woe
to the heels in the fire.' "
Muwatta Malik Book 2, Hadith 5