al-Hakm bin Nafi', Abu al-Yaman الحكم بن نافع أبو اليمان الحمصي · The Book of Agriculture

"I do not know that Shuraih ever ruled on Mudarabah disputes except in two ways. He would say to the Mudarib (the one who contributed his labor to the partnership): 'You must provide proof that a calamity befell you so that you may be excused.' Or he would say to the one who invested his money in the partnership: 'You must provide proof that your trustee betrayed his trust, otherwise his oath sworn by Allah that he did not betray…