Accompanying datasets that are referenced in the Journal Article 'Comparing the crisis of 806/1403-4 and the Fatimid fitna (450-466/1058-1073): al-Maqrīzī as a historian of the Fatimids - Datasets'. The texts used in the analysis are taken from OpenITI corpus release (Version 2021.2.5). If the ID (the final part of the text URI) has changed from the OpenITI release to this data release, then the text has been modified for this case study. File extensions following the text URI indicate that the text has had additional tags applied (either date tags, or text reuse cluster tags). csv file names indicate the text file from which the csv file was generated. This is a published part of an active research project. For other datasets and the scripts used to generate this data, see the relevant GitHub repositiories: https://github.com/mabarber92/arabic_date_tagger/tree/main, https://github.com/mabarber92/clusters-analysis, and https://github.com/mabarber92/fitna-study. Note on change from version 1.0.0 - one additional .all_dates_distinct.csv file was added that is now referenced in the accompanying Journal article. Note on change to version 1.2.0 - text reuse datasets in this release are based on a passim run on version 2022.2.7 of the OpenITI corpus. As none of the texts changed between releases, the tagged text files remain the same.