Sulayman bin Buraydah (may Allah have mercy on him) narrates from his father, Sayyiduna Buraydah (may Allah be pleased with him), that the Messenger of Allah (peace and blessings be upon him) said: "Whoever plays nardashir (backgammon) is as though he has dipped his hand in the flesh and blood of swine."
(b) In the narration of Abd al-Rahman (may Allah have mercy on him), the Prophet (peace and blessings be upon him) said: "Whoever plays nardashir, it is as though he has dyed his hand in the flesh and blood of swine."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 20949