Sunan Ibn Majah, Volume 2, Book 5, Hadith 1078 (DarusSalam) ⓘ
It was narrated that Jabir bin ‘Abdullah said: “The Messenger of Allah said: ‘Between a person and Kufr (disbelief) is abandoning the prayer.’”
حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا وَكِيعٌ، حَدَّثَنَا سُفْيَانُ، عَنْ أَبِي الزُّبَيْرِ، عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " بَيْنَ الْعَبْدِ وَبَيْنَ الْكُفْرِ تَرْكُ الصَّلاَةِ " .
also referenced under: Hadith 1078 (Reference) & Book 5, Hadith 1131 (In-Book)