It was narrated from 'Abdullah bin 'Amr that:
The Prophet [SAW] said: Whoever drinks Khamr and puts it in his belly, Allah will not accept his Salah for seven (days), if he dies during them - Muhammad bin Adam (One of the narrators) said: he will die a Kafir. If he was too intoxicated to offer any of the obligatory - Ibn Adam said: or recite Qur'an, his Salah will not be accepted for 40 days, and if he dies during them, And Ibn Adam said: He will die a Kafir.