The Messenger of Allah ﷺ said: He who plays backgammon disobeys Allah and His Apostle.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ مَنْ لَعِبَ بِالنَّرْدِ فَقَدْ عَصَى اللَّهَ وَرَسُولَهُ  

If anyone plays backgammon, he sinks his hand in the flesh of swine and its blood.  

عَنِ النَّبِيِّ ﷺ قَالَ مَنْ لَعِبَ بِالنَّرْدَشِيرِ فَكَأَنَّمَا غَمَسَ يَدَهُ فِي لَحْمِ خِنْزِيرٍ وَدَمِهِ