The Messenger of Allah ﷺ as saying: If you were to sell dried dates to your brother and they were smitten by blight, it will not be allowable for you to take your brother's property unjustly. (Using translation from Abū Dāʾūd 3470)
قَالَ رَسُولُ اللَّهِ ﷺ «إِنْ بِعْتَ أَخَاكَ تَمَرَاتٍ فَأَصَابَتْهُ جَائِحَةٌ فَلَا يَحِلُّ لَكَ أَنْ تَأْخُذَ مِنْهُ شَيْئًا أَوْ تَأْخُذَ مَالَ أَخِيكَ بِغَيْرِ إِذْنِهِ»