On the raid led by Muḥammad al-Zayn; on the instruction of the Khalīfa to avoid the fortified positions and to focus on the regions of the nomadic tribes.
- This text has been edited in Muḥammad Ibrāhīm Abū Salīm, Muḥarrarāt ʿUthmān Diqna, Khartoum, Markaz Abū Salīm li-l-dirāsāt, 2004. See letter 313
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