Jami` at-Tirmidhi 2619
جامع الترمذي#2619Sahihحَدَّثَنَا هَنَّادٌ، حَدَّثَنَا أَسْبَاطُ بْنُ مُحَمَّدٍ، عَنِ الأَعْمَشِ، بِهَذَا الإِسْنَادِ نَحْوَهُ وَقَالَ " بَيْنَ الْعَبْدِ وَبَيْنَ الشِّرْكِ أَوِ الْكُفْرِ تَرْكُ الصَّلاَةِ " . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ وَأَبُو سُفْيَانَ اسْمُهُ طَلْحَةُ بْنُ نَافِعٍ .
Narrated Al-A'mash:Similar to the previous chain and said: "Between a slave and Shirk or disbelief is abandoning the Salat
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:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiSahih
In-book reference: 40:14