صحيح البخاري Sahih Bukhari كتاب الأحكام The Book of Al-Ahkam (Judgements)
بَابُ مَنْ لَمْ يَكْتَرِثْ بِطَعْنِ مَنْ لاَ يَعْلَمُ فِي الأُمَرَاءِ حَدِيثًا:

(33) Chapter. Whoever does not care slanders made by ignorant people against the Amirs (leaders).

1 hadith
Hadith 7187
حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ ، حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ مُسْلِمٍ ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ دِينَارٍ ، قَالَ : سَمِعْتُ ابْنَ عُمَرَ رَضِيَ اللَّهُ عَنْهُمَا ، يَقُولُ : " بَعَثَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ بَعْثًا ، وَأَمَّرَ عَلَيْهِمْ أُسَامَةَ بْنَ زَيْدٍ ، فَطُعِنَ فِي إِمَارَتِهِ ، وَقَالَ : إِنْ تَطْعَنُوا فِي إِمَارَتِهِ فَقَدْ كُنْتُمْ تَطْعَنُونَ فِي إِمَارَةِ أَبِيهِ مِنْ قَبْلِهِ ، وَايْمُ اللَّهِ إِنْ كَانَ لَخَلِيقًا لِلْإِمْرَةِ ، وَإِنْ كَانَ لَمِنْ أَحَبِّ النَّاسِ إِلَيَّ ، وَإِنَّ هَذَا لَمِنْ أَحَبِّ النَّاسِ إِلَيَّ بَعْدَه " .
Narrated Ibn `Umar: Allah's Apostle sent an army unit headed by Usama bin Zaid and the people criticized his leadership. The Prophet said (to the people), "If you are criticizing his leadership now, then you used to criticize his father's leadership before. By Allah, he (Usama's father) deserved the leadership and used to be one of the most beloved persons to me, and now his son (Usama) is one of the most beloved persons to me after him. " (See Hadith No. 745, Vol. 5)
Hadith Reference Sahih Bukhari / The Book of Al-Ahkam (Judgements) / Hadith: 7187
Hadith Grading محدثین: أحاديث صحيح البخاريّ كلّها صحيحة