Jami` at-Tirmidhi 643
جامع الترمذي#643Da'ifAbdur-Rahman bin Mas'ud bin Niyar said:"Sahl bin Abi Hathmah came to a gathering of ours, and he narrated that the Messenger of Allah would say: "When you make an assessment, then take it and leave a third, if you do not leave a third, then leave a quarter
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirDaif
Al-AlbaniDaif
Zubair Ali ZaiIsnaad Hasan
In-book reference: 7:27