"Do not go out to meet the riders, and do not bind the udders of camels and seep. Whoever has boughty anything in that manner has two choices: If he whishes he may keep it, or if he wants to return it he may return it, along with a Sa of dates." (Sahih )  

عَنِ النَّبِيِّ ﷺ قَالَ لاَ تَلَقُّوا الرُّكْبَانَ لِلْبَيْعِ وَلاَ تُصَرُّوا الإِبِلَ وَالْغَنَمَ مَنِ ابْتَاعَ مِنْ ذَلِكَ شَيْئًا فَهُوَ بِخَيْرِ النَّظَرَيْنِ فَإِنْ شَاءَ أَمْسَكَهَا وَإِنْ شَاءَ أَنْ يَرُدَّهَا رَدَّهَا وَمَعَهَا صَاعُ تَمْرٍ  

"whoever buys a Musarraha, if he is please with it when he milks it, he may keep it, and if he is not please with it, he may return it, along with a Sa of daters"' (Sahih )  

عَنْ رَسُولِ اللَّهِ ﷺ قَالَ مَنِ اشْتَرَى مُصَرَّاةً فَإِنْ رَضِيَهَا إِذَا حَلَبَهَا فَلْيُمْسِكْهَا وَإِنْ كَرِهَهَا فَلْيَرُدَّهَا وَمَعَهَا صَاعٌ مِنْ تَمْرٍ  

Abu Al- Qasim said: "Whoever buys a Musarrah, he has the choice (of annulling the deal) for three days. If the wishes ti keep it, he may keep it, and if he wishes to return it, he may return it, along with a Sa of daters, not wheat." (Sahih )  

أَبُو الْقَاسِمِ ﷺ مَنِ ابْتَاعَ مُحَفَّلَةً أَوْ مُصَرَّاةً فَهُوَ بِالْخِيَارِ ثَلاَثَةَ أَيَّامٍ إِنْ شَاءَ أَنْ يُمْسِكَهَا أَمْسَكَهَا وَإِنْ شَاءَ أَنْ يَرُدَّهَا رَدَّهَا وَصَاعًا مِنْ تَمْرٍ لاَ سَمْرَاءَ