Musnad Ahmad 1017:91

'Abd al-Razzaq narrated to us, Sufyan informed us, from 'Alqamah ibn Marthad, from Sulayman ibn Buraydah, from his father, from the Prophet, may Allah bless him and grant him peace, who said: "Whoever plays with Nardshir (backgammon), it is as if he has dipped his hands into the flesh and blood of a swine."