Prophet Muhammad (Sallallaahu`Alaihi Wasallam) is reported to have said: Halal is clear and Haram is clear; in between these two are certain things that are suspected. Many people may not know whether those items are Halal or Haram. Whosoever leaves them, he is innocent towards his religion and his conscience. He is, therefore, safe. Anyone who gets involved in any of these suspected items, he may fall into the unlawful and the prohibited. This case is similar to the one who wished to raise his animals too close to a restricted area, so that the animals may step into that area. Indeed for every landlord there is a restricted area. Indeed the restriction of Allah (Subhanahu Wa Ta’ala) are the Haram.” (Sahih Bukhari & Sahih Muslim)