كتاب الصلاة
5  
The Book of Salah
(8)
Chapter: The Ruling On One Who Does Not Perform Salah
(8)
باب الْحُكْمِ فِي تَارِكِ الصَّلاَةِ ‏.‏
Sunan an-Nasa'i 463
It was narrated from 'Abdullah bin Buraidah that his father said:
"The Messenger of Allah (ﷺ) said: 'The covenant that stands between us and them is the Salah; whoever abandons it, he has committed disbelief.'"
أَخْبَرَنَا الْحُسَيْنُ بْنُ حُرَيْثٍ، قَالَ أَنْبَأَنَا الْفَضْلُ بْنُ مُوسَى، عَنِ الْحُسَيْنِ بْنِ وَاقِدٍ، عَنْ عَبْدِ اللَّهِ بْنِ بُرَيْدَةَ، عَنْ أَبِيهِ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ إِنَّ الْعَهْدَ الَّذِي بَيْنَنَا وَبَيْنَهُمُ الصَّلاَةُ فَمَنْ تَرَكَهَا فَقَدْ كَفَرَ ‏"‏ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan an-Nasa'i 463
In-book reference : Book 5, Hadith 16
English translation : Vol. 1, Book 5, Hadith 464