English translation
1605. Sahl bin Abī Hathmah said: "The Messenger of Allāh ﷺ commanded us as follows: 'When you estimate, then take, and leave a third; if you do not leave or find a third, then leave a fourth.'" (Hasan) Abū Dāwud said: (This means) that the one estimating should leave a third for trade.
