It is narrated from Sayyiduna Salman al-Farisi (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) was asked about cheese, ghee and furs, and the Prophet (peace and blessings be upon him) said: "The lawful is what Allah has made lawful in the Qur'an, and the unlawful is what Allah has made unlawful in the Qur'an, and whatever He has remained silent about is pardoned."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6134