On agriculture: Khalīfa exhorts ʿUthmān Diqna to cultivate all the available fields in his area.
- This text has been edited in Muḥammad Ibrāhīm Abū Salīm, Muḥarrarāt ʿUthmān Diqna, Khartoum, Markaz Abū Salīm li-l-dirāsāt, 2004. See letter 282
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