مُسْنَدُ أَحْمَدَ
Musnad Ahmad 393
The Hadeeth of Saqeefah
حَدَّثَنَا إِسْحَاقُ بْنُ عِيسَى، حَدَّثَنَا مَالِكٌ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، رَضِيَ اللَّهُ عَنْهُ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ الْمُتَبَايِعَانِ بِالْخِيَارِ مَا لَمْ يَتَفَرَّقَا أَوْ يَكُونُ الْبَيْعُ خِيَارًا.
It was narrated that Ibn `Umar (رضي الله عنه) said: The Messenger of Allah (ﷺ) said: “The two parties to a transaction have the option (of cancelling it) so long as they have not parted or there is a condition which gives the option to cancel.`
Musnad Ahmad, 393Sahih (Darussalam) [, al-Bukhari (2107) and Muslim (1531), (