Nahj al-Balāgha

Hadith 1634
governance
ومن وصية له (عليه السلام) لعبد الله بن العباس لما بعثه للاحتجاج على الخوارج
Given to ‘Abdullāh ibn al-‘Abbās, at the time of his being deputed to confront the Khārijītes.
Source: al-Sharīf al-Raḍī