On the Khalīfa’s instruction to ʿUthmān Diqna not to send the post with foreigners but with the brothers of the Ruṭāna.
- This text has been edited in Muḥammad Ibrāhīm Abū Salīm, Muḥarrarāt ʿUthmān Diqna, Khartoum, Markaz Abū Salīm li-l-dirāsāt, 2004. See letter 475
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