Narrated by Sayyiduna Uqbah bin Amir (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: The responsibility of a slave is for four nights. Whereas Qatadah says: According to the people of Madinah, it is three nights.
Hadith Takhrij«اسناده ضعيف، الحسن البصري لم يسمع من عقبة، ثم ھو مضطرب۔ أخرجه ابن ماجه: 2245، وأخرجه بنحوه ابوداود: 3507 ، (انظر مسند أحمد ترقيم الرسالة: 17358 ترقیم بيت الأفكار الدولية: 17491»
Brief Explanation
Benefits: … That is, if any defect is found in a slave within four days, then he may be returned to the seller without the need for witnesses. However, if the buyer claims a defect after this period, then witnesses will be required to establish whether the slave was indeed defective from the beginning. However, this narration is weak.