Nahj al-Balāgha

Hadith 1547
warfare-jihad
ومن وصيته له (عليه السلام) وصى بها شريح بن هانئ لما جعله على مقدمته إلى الشام
When Amīr al-mu’minīn placed Shurayḥ ibn Hānī (al-Madhḥijī) at the head of the vanguard preceding towards Syria, he issued this document of instruction to him.
Source: al-Sharīf al-Raḍī