Manusmriti
द्यूतं समाह्वयं चैव राजा राष्ट्रात्निवारयेत् । राजान्तकरणावेतौ द्वौ दोषौ पृथिवीक्षिताम् ॥ २२१ ॥
Gambling and betting let the king exclude from his realm; those two vices cause the destruction of the kingdoms of princes.
english translation
dyUtaM samAhvayaM caiva rAjA rASTrAtnivArayet । rAjAntakaraNAvetau dvau doSau pRthivIkSitAm ॥ 221 ॥
hk transliteration by Sanscript