The Book on Government
وَحَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ سِمَاكِ بْنِ جَابِرِ بْنِ سَمُرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم بِهَذَا الْحَدِيثِ وَلَمْ يَذْكُرْ " لاَ يَزَالُ أَمْرُ النَّاسِ مَاضِيًا " .This hadith has been narrated on the authority of Jabir b. Samura through another chain of transmitters
From Sahih Muslim, whose reports the scholars accept as authentic.