(2) باب تَأْمِيرِ الإِمَامِ الأُمَرَاءَ عَلَى الْبُعُوثِ وَوَصِيَّتِهِ إِيَّاهُمْ بِآدَابِ الْغَزْوِ وَغَيْرِهَا
Sulaiman b. Buraida repotted on the authority of his father that when Allah's Messenger (ﷺ) sent an Amir with a detachment he called him and advised him. The rest of the hadith is the same.
Reference: Sahih Muslim 1731 c
In-book reference: Book 32, Hadith 4
USC-MSA web (English) reference(deprecated numbering scheme): Book 19, Hadith 4295