Musnad Abu Ya'la al-Mawsili 243:68

Al-Qawariri narrated to us, Makki narrated to us, from al-Ja'id ibn 'Abd al-Rahman, from Yazid ibn Khusayfah, from Humayd ibn Bashir, from Muhammad ibn Ka'b al-Qurazi, who said: Abu Musa al-Ash'ari narrated to me, saying: The Messenger of Allah (ﷺ) said: "No man shall turn over its dice (ka'batayn) looking to see what they bring forth, except that he has disobeyed Allah and His Messenger."