Sunan an-Nasa'i 464
سنن النسائي#464Sahihأَخْبَرَنَا أَحْمَدُ بْنُ حَرْبٍ، حَدَّثَنَا مُحَمَّدُ بْنُ رَبِيعَةَ، عَنِ ابْنِ جُرَيْجٍ، عَنْ أَبِي الزُّبَيْرِ، عَنْ جَابِرٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " لَيْسَ بَيْنَ الْعَبْدِ وَبَيْنَ الْكُفْرِ إِلاَّ تَرْكُ الصَّلاَةِ " .
It was narrated that Jabir said:"The Messenger of Allah (ﷺ) said: 'There is nothing between a person and disbelief except abandoning Salah
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 5:17