Nahj al-Balāgha

Hadith 1298
governance
ومن عهد له (عليه السلام) إلى محمد بن أبي بكر (رضي الله عنه) حين قلده مصر
Given to Muḥammad ibn Abī Bakr (may Allāh be pleased with him), when Amīr al-mu’minīn appointed him as the Governor of Egypt.
Source: al-Sharīf al-Raḍī