"O Allah, bless my nation in their early mornings.". It was narrated from Abu Hurairah that the Prophet ﷺ said: "Whoever buys a Musarrah, he has the choice (of annulling the deal) for three days. If he returns it, then he must also give a Sa' of dates, not Samra'." Meaning wheat.
عَنِ النَّبِيِّ ﷺ قَالَ مَنِ ابْتَاعَ مُصَرَّاةً فَهُوَ بِالْخِيَارِ ثَلاَثَةَ أَيَّامٍ فَإِنْ رَدَّهَا رَدَّ مَعَهَا صَاعًا مِنْ تَمْرٍ لاَ سَمْرَاءَ يَعْنِي الْحِنْطَةَ