[Machine] The Messenger of Allah ﷺ said, "The most merciful among my Ummah (nation) towards my Ummah is Abu Bakr, and the strongest of them in the matter of Allah is Umar, and the most modest among them is Uthman, and the most knowledgeable about the Book of Allah is Ubayy bin Ka'b, and the most qualified to distinguish between lawful and unlawful matters is Mu'adh, except that every Ummah has a trustworthy person, and the trustworthy person of this Ummah is Abu Ubaidah bin Jarrah." This is an authentic chain, according to the conditions of the two Sheikhs (Al-Bukhari and Muslim), and they did not exclude it using this version. They only agreed on mentioning Abu Ubaidah in the chain, and I have mentioned its reason in the book of Al-Talkhis according to the conditions of Al-Bukhari and Muslim.
قَالَ رَسُولُ اللَّهِ ﷺ «أرْحَمُ أُمَّتِي بِأُمَّتِي أَبُو بَكْرٍ وَأَشَدُّهُمْ فِي أَمْرِ اللَّهِ عُمَرُ وَأَصْدَقُهُمْ حَيَاءً عُثْمَانُ وَأَقْرَؤُهُمْ لِكِتَابِ اللَّهِ أُبَيُّ بْنُ كَعْبٍ وَأَفْرَضُهُمْ زَيْدُ بْنُ ثَابِتٍ وَأَعْلَمُهُمْ بِالْحَلَالِ وَالْحَرَامِ مُعَاذٌ إِلَّا أَنَّ لِكُلِّ أُمَّةٍ أَمِينًا وَإِنَّ أَمِينَ هَذِهِ الْأُمَّةِ أَبُوعُبَيْدَةَ بْنُ الْجَرَّاحِ» هَذَا إِسْنَادٌ صَحِيحٌ عَلَى شَرْطِ الشَّيْخَيْنِ وَلَمْ يُخَرِّجَاهُ بِهَذِهِ السِّيَاقَةِ وَإِنَّمَا اتَّفَقَا بِإِسْنَادِهِ هَذَا عَلَى ذِكْرِ أَبِي عُبَيْدَةَ فَقَطْ وَقَدْ ذَكَرْتُ عِلَّتَهُ فِي كِتَابِ التَّلْخِيصِ على شرط البخاري ومسلم