Nahj al-Balāgha

Hadith 1631
governance
ومن وصية له (عليه السلام) لعبد الله بن العباس عند استخلافه إياه على البصرة
Given to ‘Abdullāh ibn al-‘Abbās at the time of his appointment as his Governor of Baṣrah.
Source: al-Sharīf al-Raḍī