Sunan Ibn Majah 1482
سنن ابن ماجه#1482Sahihحَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، وَهِشَامُ بْنُ عَمَّارٍ، وَسَهْلُ بْنُ أَبِي سَهْلٍ، قَالُوا حَدَّثَنَا سُفْيَانُ، عَنِ الزُّهْرِيِّ، عَنْ سَالِمٍ، عَنْ أَبِيهِ، قَالَ رَأَيْتُ النَّبِيَّ ـ صلى الله عليه وسلم ـ وَأَبَا بَكْرٍ وَعُمَرَ يَمْشُونَ أَمَامَ الْجِنَازَةِ .
It was narrated from Salim that his father said:“I saw the Prophet (ﷺ), Abu Bakr and ‘Umar walking ahead of the funeral (procession).”
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:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Zubair Ali ZaiSahih
In-book reference: 6:50