Sahih Muslim
The Book of Jihad and Expedition (Kitab Al-Jihad wal-Siyar)
Book Number: 019 / Hadith Number: 4295
Sulaiman b. Buraida repotted on the authority of his father that when Allah's Messenger (may peace be upon him) sent an Amir with a detachment he called him and advised him. The rest of the hadith is the same.