Sahih al-Bukhari 2051

Muhammad ibn al-Muthanna told me: Ibn Abi Adi narrated to us, from Ibn Awn, from al-Shabi, who said: I heard al-Numan ibn Bashir, may Allah be pleased with him, say: I heard the Prophet, peace and blessings be upon him. Ali ibn Abd Allah narrated to us: Ibn Uyayna narrated to us, from Abu Farwa, from al-Shabi, who said: I heard al-Numan, from the Prophet. Abdullah ibn Muhammad narrated to us: Ibn Uyayna narrated to us, from Abu Farwa, who said: I heard al-Shabi, who said: I heard al-Numan ibn Bashir, may Allah be pleased with them both, from the Prophet. Muhammad ibn Kathir narrated to us: Sufyan informed us, from Abu Farwa, from al-Shabi, from al-Numan ibn Bashir, may Allah be pleased with him, who said: The Prophet, peace and blessings be upon him, said, “The lawful is clear and the unlawful is clear, and between them are matters that are unclear. Whoever leaves what is unclear to him for fear that it may be sinful will be even more ready to leave what is plainly sinful. Whoever boldly undertakes what he doubts may be sinful is close to falling into what is plainly sinful. Acts of disobedience are Allah protected reserve; whoever grazes around the reserve is close to entering it.”