Sahih al-Bukhari 4156
صحيح البخاري#4156Sahihحَدَّثَنَا إِبْرَاهِيمُ بْنُ مُوسَى، أَخْبَرَنَا عِيسَى، عَنْ إِسْمَاعِيلَ، عَنْ قَيْسٍ، أَنَّهُ سَمِعَ مِرْدَاسًا الأَسْلَمِيَّ، يَقُولُ ـ وَكَانَ مِنْ أَصْحَابِ الشَّجَرَةِ ـ يُقْبَضُ الصَّالِحُونَ الأَوَّلُ فَالأَوَّلُ، وَتَبْقَى حُفَالَةٌ كَحُفَالَةِ التَّمْرِ وَالشَّعِيرِ، لاَ يَعْبَأُ اللَّهُ بِهِمْ شَيْئًا.
Narrated Mirdas Al-Aslami:Who was among those (who had given the Pledge of allegiance) under the Tree: Pious people will die in succession, and there will remain the dregs of society who will be like the useless residues of dates and barley and Allah will pay no attention to them
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 al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 64:200