Sahih Muslim 246
صحيح مسلم#246Sahihحَدَّثَنَا يَحْيَى بْنُ يَحْيَى التَّمِيمِيُّ، وَعُثْمَانُ بْنُ أَبِي شَيْبَةَ، كِلاَهُمَا عَنْ جَرِيرٍ، قَالَ يَحْيَى أَخْبَرَنَا جَرِيرٌ، عَنِ الأَعْمَشِ، عَنْ أَبِي سُفْيَانَ، قَالَ سَمِعْتُ جَابِرًا، يَقُولُ سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم يَقُولُ " إِنَّ بَيْنَ الرَّجُلِ وَبَيْنَ الشِّرْكِ وَالْكُفْرِ تَرْكَ الصَّلاَةِ " .
It is narrated on the authority of Jabir that he heard the Apostle (may peace and blessings be upon him) saying. Verily between man and between polytheism and unbelief is the negligence of prayer
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:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 1:153