Musnad Abu Ya'la al-Mawsili 243:69

Ubayd Allah ibn Umar al-Jushami narrated to us, Yahya ibn Sa’id and Bishr ibn al-Mufaddal narrated to us, from Ubayd Allah, from Nafi’, from Sa’id ibn Abi Hind, from Abu Musa al-Ash’ari, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Whoever plays with dice has disobeyed Allah and His Messenger."