"I heard Nafi narrating from Ibn 'Umar, form the Messenger of Allah 'the two parties to a transaction both have the choice so long as they have not separated unless they have chosen to conclude the transaction. " Nafi said: ''When 'Abdullah bought something he like, he would leave straightaway." (Using translation from Nasāʾī 4473)
عَنْ رَسُولِ اللهِ ﷺ «أَنَّ الْمُتَبَايِعَيْنِ بِالْخِيَارِ فِي بَيْعِهِمَا مَا لَمْ يَفْتَرِقَا إِلَّا أَنْ يَكُونَ الْبَيْعُ خِيَارًا» قَالَ نَافِعٌ وَكَانَ عَبْدُ اللهِ بْنُ عُمَرَ إِذَا اشْتَرَى شَيْئًا يُعْجِبُهُ فَارَقَ صَاحِبَهُ