Sunan Abi Dawud 4631
سنن أبي داود#4631Da'ifحَدَّثَنَا مُحَمَّدُ بْنُ فَارِسٍ، حَدَّثَنَا قَبِيصَةُ، حَدَّثَنَا عَبَّادٌ السَّمَّاكُ، قَالَ سَمِعْتُ سُفْيَانَ الثَّوْرِيَّ، يَقُولُ الْخُلَفَاءُ خَمْسَةٌ أَبُو بَكْرٍ وَعُمَرُ وَعُثْمَانُ وَعَلِيٌّ وَعُمَرُ بْنُ عَبْدِ الْعَزِيزِ رضى الله عنهم .
Sufyan al-Thawri said:The Caliphs are five: Abu Bakr, ‘Umar, ‘Uthman, ‘All and ‘Umar b. ‘Abd al-Aziz
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-AlbaniDaif Isnaad Maqtu
Muhammad Muhyi Al-Din Abdul HamidDaif Isnaad Maqtu
Shuaib Al ArnautDaif
Zubair Ali ZaiDaif
In-book reference: 42:36