It is narrated from Hazrat Nu'man bin Bashir (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The lawful is clear and the unlawful is clear, and between them are doubtful matters. Whoever leaves these doubtful matters will easily be able to avoid the unlawful. And the prohibitions of Allah are His pastures, and whoever grazes his animals around the pasture, there is a fear that he may enter into it."