Sahih Muslim 1555
Sahih Muslim · Book 22: The Book of Musaqah · Waiving Payment in the case of Blight
Anas (Allah be pleased with him) reported Allah's Apostle (ﷺ) as saying:
حَدَّثَنِي مُحَمَّدُ بْنُ عَبَّادٍ ، حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ مُحَمَّدٍ ، عَنْ حُمَيْدٍ ، عَنْ أَنَسٍ ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " إِنْ لَمْ يُثْمِرْهَا اللَّهُ فَبِمَ يَسْتَحِلُّ أَحَدُكُمْ مَالَ أَخِيهِ " .
If Allah does not fructify them, then what is permissible for one of you to take the wealth of his brother?