It is narrated from Sayyiduna al-Aswad bin Sari' (may Allah be pleased with him) that a Bedouin captive was brought to the Prophet (peace and blessings be upon him), and he said: I repent to Allah, the Mighty and Majestic, and I do not repent to Muhammad (peace and blessings be upon him). So the Messenger of Allah (peace and blessings be upon him) said: "He has recognised the right as belonging to its rightful owner." This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.