Jami` at-Tirmidhi 2225
جامع الترمذي#2225Sahihحَدَّثَنَا يَحْيَى بْنُ مُوسَى، حَدَّثَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنِ الزُّهْرِيِّ، عَنْ سَالِمِ بْنِ عَبْدِ اللَّهِ بْنِ عُمَرَ، عَنْ أَبِيهِ، قَالَ قِيلَ لِعُمَرَ بْنِ الْخَطَّابِ لَوِ اسْتَخْلَفْتَ قَالَ إِنْ أَسْتَخْلِفْ فَقَدِ اسْتَخْلَفَ أَبُو بَكْرٍ وَإِنْ لَمْ أَسْتَخْلِفْ لَمْ يَسْتَخْلِفْ رَسُولُ اللَّهِ صلى الله عليه وسلم . قَالَ أَبُو عِيسَى وَفِي الْحَدِيثِ قِصَّةٌ طَوِيلَةٌ . وَهَذَا حَدِيثٌ صَحِيحٌ قَدْ رُوِيَ مِنْ غَيْرِ وَجْهٍ عَنِ ابْنِ عُمَرَ .
Salim bin 'Abdullah narrated from his father who said:"It was said to 'Umar bin Al-Khattab: 'Perhaps you should endorse your successor.' He said: 'If I appoint a successor, then indeed Abu Bakr appointed a successor. And if I do not appoint a successor, the Messenger of Allah(s.a.w) did not appoint a successor
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:
In-book reference: 33:68