'Abdullah ibn Mas'ud said, "Beware of these two marked cubes. They should be forcibly prohibited. They are part of gambling."
الأدب المفرد ١٢٧٠:
إِيَّاكُمْ وَهَاتَيْنِ الْكَعْبَتَيْنِ الْمَوْسُومَتَيْنِ اللَّتَيْنِ يُزْجَرَانِ زَجْرًا فَإِنَّهُمَا مِنَ الْمَيْسِرِ