Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
tirmidhi:3673Naṣr

that the Messenger of Allah ﷺ said: "It is not befitting that a group, among whom is Abu Bakr, be led by other than him."  

Abū ʿĪsá said that this Ḥadīth is Ḥasan-Gharīb.
الترمذي:٣٦٧٣حَدَّثَنَا نَصْرُ بْنُ عَبْدِ الرَّحْمَنِ الْكُوفِيُّ قَالَ حَدَّثَنَا أَحْمَدُ بْنُ بَشِيرٍ عَنْ عِيسَى بْنِ مَيْمُونٍ الأَنْصَارِيِّ عَنِ الْقَاسِمِ بْنِ مُحَمَّدٍ عَنْ عَائِشَةَ ؓ قَالَتْ

قَالَ رَسُولُ اللَّهِ ﷺ لاَ يَنْبَغِي لِقَوْمٍ فِيهِمْ أَبُو بَكْرٍ أَنْ يَؤُمَّهُمْ غَيْرُهُ  

قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ غَرِيبٌ

See similar narrations below:

Collected by Suyūṭī