Both parties in a business transaction have the right to annul it so long as they have not separated; except in transactions which have been made subject to the right of parties to annul them.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ الْبَيِّعَانِ كُلُّ وَاحِدٍ مِنْهُمَا بِالْخِيَارِ عَلَى صَاحِبِهِ مَا لَمْ يَتَفَرَّقَا إِلاَّ بَيْعَ الْخِيَارِ  

"The two parties to a transaction both have the choice so long as they both chosen to conclude the transaction." (Sahih )  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ الْمُتَبَايِعَانِ كُلُّ وَاحِدٍ مِنْهُمَا بِالْخِيَارِ عَلَى صَاحِبِهِ مَا لَمْ يَفْتَرِقَا إِلاَّ بَيْعَ الْخِيَارِ  

The Messenger of Allah ﷺ as saying: Each one of the two parties in a business has an option (to annul it) against the other party so long as they have not separated, except in a conditional bargain.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ الْمُتَبَايِعَانِ كُلُّ وَاحِدٍ مِنْهُمَا بِالْخِيَارِ عَلَى صَاحِبِهِ مَا لَمْ يَفْتَرِقَا إِلاَّ بَيْعَ الْخِيَارِ  

Yahya related to me from Malik from Nafi from Abdullah ibn Umar that the Messenger of Allah ﷺ said, "Both parties in a business transaction have the right of withdrawal as long as they have not separated, except in the transaction called khiyar." Malik said, "There is no specified limit nor any matter which is applied in this case according to us."  

أنَّ رَسُولَ اللَّهِ ﷺ قالَ: «المُتَبايِعانِ كُلُّ واحِدٍ مِنهُما بِالخِيارِ عَلى صاحِبِهِ، ما لَمْ يَتَفَرَّقا إلّا بَيْعَ الخِيارِ» قالَ مالِكٌ: «ولَيْسَ لِهَذا عِنْدَنا حَدٌّ مَعْرُوفٌ، ولا أمْرٌ مَعْمُولٌ بِهِ فِيهِ»  

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.ʿ  

قَالَ رَسُولُ اللهِ ﷺ الْمُتَبَايِعَانِ بِالْخِيَارِ مَا لَمْ يَتَفَرَّقَا أَوْ يَكُونُ الْبَيْعُ خِيَارًا  

"The Messenger of Allah said: "The two parties to a transaction both have the choice who long as they have not separated or one of them says to the other: 'Decide!"' (Sahih ) (Using translation from Nasāʾī 4469)   

أَنَّ رَسُولَ اللهِ ﷺ قَالَ الْبَيِّعَانِ بِالْخِيَارِ مَا لَمْ يَتَفَرَّقَا أَوْ يَقُولُ أَحَدُهُمَا لِصَاحِبِهِ اخْتَرْ  

[Machine] The Messenger of Allah ﷺ said, "The two parties in a transaction have the option (to cancel) as long as they have not separated (from each other), or until one of them has taken what was agreed upon in the transaction."  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ الْبَيِّعَانِ بِالْخِيَارِ مَا لَمْ يَتَفَرَّقَا أَوْ يَأْخُذْ كُلُّ وَاحِدٍ مِنْهُمَا مَا رَضِيَ مِنَ الْبَيْعِ  

[Machine] The Prophet ﷺ said: "The two parties involved in a transaction have the option to cancel it as long as they have not separated, and each one must take what he is pleased with from the sale."  

أَنَّ النَّبِيَّ ﷺ قَالَ الْبَيِّعَانِ بِالْخِيَارِ مَا لَمْ يَتَفَرَّقَا وَيَأْخُذْ كُلُّ وَاحِدٍ مِنْهُمَا مَا رَضِيَ مِنَ الْبَيْعِ  

Messenger of Allah 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). (Using translation from Bukhārī 2111)  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ «الْمُتَبَايعَانِ كُلُّ وَاحِدٍ مِنْهُمَا عَلَى صَاحِبِهِ بِالْخِيَارِ مَا لَمْ يَتَفَرَّقَا إِلَّا بَيْعَ الْخِيَارِ»  

"The Messenger of Allah said;" Two traders have the choice as long as they have not separated, or until they reach a deal that suits both of th4em or that is satisfactory (to both)" (Using translation from Nasāʾī 4482)   

قَالَ رَسُولُ اللهِ ﷺ «الْبَيِّعَانِ بِالْخِيَارِ مَا لَمْ يَتَفَرَّقَا وَيَأْخُذُ كُلُّ وَاحِدٍ مِنْهُمَا مَا رَضِيَ مِنَ الْبَيْعِ»  

The Messenger of Allah ﷺ as saying: Each one of the two parties in a business has an option (to annul it) against the other party so long as they have not separated, except in a conditional bargain. (Using translation from Abū Dāʾūd 3454)  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ «الْمُتَبَايِعَانِ كُلُّ وَاحِدٍ مِنْهُمَا بِالْخِيَارِ عَلَى صَاحِبِهِ مَا لَمْ يَتَفَرَّقَا إِلَّا بَيْعَ الْخِيَارِ»  

"المُتَبَايِعَانَ كُلُّ واحِدٍ منْهُمَا بالخيَارِ عَلَى صَاحبِهِ مَا لَمْ يَتَفَرَّقَا إِلا بَيع الخِيَارِ" .