Yahya bin Saeed said: Blight is not effective when less than one-third of goods are damaged. Yayha said: That has been the established practice of Muslims.
Hadith Referenceسنن ابي داود / كتاب الإجارة / 3472
Hadith Gradingالألبانی:حسن مقطوع | زبیر علی زئی:إسناده حسن