(51) The Book of Drinks
كتاب الأشربة
(43) Chapter: Mentioning the Reports Concerning the Salah of the One Who Drinks Khamr
(43) باب ذِكْرِ الرِّوَايَةِ الْمُبَيِّنَةِ عَنْ صَلَوَاتِ، شَارِبِ الْخَمْرِ ‏.‏
Sunan an-Nasa'i 5665 
It was narrated that Masruq said:
"If a judge accepts a gift he has consumed something unlawful, and if he accepts a bribe, that takes him to the level of Kufr." Masruq said: "Whoever drinks Khamr, he has committed (an act of) Kufr, and his Kufr is that his Salah does not count."
أَخْبَرَنَا قُتَيْبَةُ، وَعَلِيُّ بْنُ حُجْرٍ، قَالاَ حَدَّثَنَا خَلَفٌ، - يَعْنِي ابْنَ خَلِيفَةَ - عَنْ مَنْصُورِ بْنِ زَاذَانَ، عَنِ الْحَكَمِ بْنِ عُتَيْبَةَ، عَنْ أَبِي وَائِلٍ، عَنْ مَسْرُوقٍ، قَالَ الْقَاضِي إِذَا أَكَلَ الْهَدِيَّةَ فَقَدْ أَكَلَ السُّحْتَ وَإِذَا قَبِلَ الرِّشْوَةَ بَلَغَتْ بِهِ الْكُفْرَ ‏.‏ وَقَالَ مَسْرُوقٌ مَنْ شَرِبَ الْخَمْرَ فَقَدْ كَفَرَ وَكُفْرُهُ أَنْ لَيْسَ لَهُ صَلاَةٌ ‏.‏
Grade :  Da'if (Darussalam)
Reference : Sunan an-Nasa'i 5665
In-book reference : Book 51, Hadith 127
English translation : Vol. 6, Book 51, Hadith 5668