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."  

عَنْ أَبِيهِ اسْتَعْمَلَ النَّبِيُّ ﷺ أُسَامَةَ فَقَالُوا فِيهِ فَقَالَ النَّبِيُّ ﷺ قَدْ بَلَغَنِي أَنَّكُمْ قُلْتُمْ فِي أُسَامَةَ وَإِنَّهُ أَحَبُّ النَّاسِ إِلَىَّ  

Messenger of Allah ﷺ sent troops appointed Usama bin Zaid as their commander. The people criticized his leadership. Messenger of Allah ﷺ got up and said, "If you (people) are criticizing his (i.e. Usama's) leadership you used to criticize the leadership of his father before. By Allah, he (i.e. Zaid) deserved the leadership indeed, and he used to be one of the most beloved persons to me, and now this (i.e. his son, Usama) is one of the most beloved persons to me after him."  

أَنَّ رَسُولَ اللَّهِ ﷺ بَعَثَ بَعْثًا وَأَمَّرَ عَلَيْهِمْ أُسَامَةَ بْنَ زَيْدٍ فَطَعَنَ النَّاسُ فِي إِمَارَتِهِ فَقَامَ رَسُولُ اللَّهِ ﷺ فَقَالَ إِنْ تَطْعُنُوا فِي إِمَارَتِهِ فَقَدْ كُنْتُمْ تَطْعُنُونَ فِي إِمَارَةِ أَبِيهِ مِنْ قَبْلُ وَايْمُ اللَّهِ إِنْ كَانَ لَخَلِيقًا لِلإِمَارَةِ وَإِنْ كَانَ لَمِنْ أَحَبِّ النَّاسِ إِلَىَّ وَإِنَّ هَذَا لَمِنْ أَحَبِّ النَّاسِ إِلَىَّ بَعْدَهُ