On the letter sent by the Khalīfa to ʿUthmān Diqna to praise the anṣār for their action in Arkawīt.
- This text has been edited in Muḥammad Ibrāhīm Abū Salīm, Muḥarrarāt ʿUthmān Diqna, Khartoum, Markaz Abū Salīm li-l-dirāsāt, 2004. See letter 426
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