(87) باب بَعْثُ النَّبِيِّ صلى الله عليه وسلم أُسَامَةَ بْنَ زَيْدٍ ـ رضى الله عنهما ـ فِي مَرَضِهِ الَّذِيتُوُفِّيَ فِيهِ
Narrated Salim's father:
The Prophet (ﷺ) appointed Usama as the commander of the troops (to be sent to Syria). The Muslims spoke about Usama (unfavorably ). The Prophet (ﷺ) said, " I have been informed that you spoke about Usama. (Let it be known that ) he is the most beloved of all people to me."
Reference: Sahih al-Bukhari 4468
In-book reference: Book 64, Hadith 483
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 5, Book 59, Hadith 744