Bibliography
- Al-Maarif, by Ibn Qutaybah, page 77, Chapter "Dhikr Umar"
- Al-Istiab, Volume 4, page 492
- Asad al-Ghaybah fi Marifathul Sahaba, Volume 5, page 367
- Tareekh Baghdad, Volume 6, page 182
- Tareekh Khamees, Volume 2, page 384, Dhikr Umm Kalthum
- Tabaqat ibn Sa'd, Volume 8, page 463, Dhikr Umm Kalthum
- Sawaiqh al-Muhriqa, page 94
- Zakhair al-Akba, pages 168 and 169
- Asaaf al-Ghaneen, page 162
- Al-Isaba, Volume 4, page 321
- Furu' al-Kafi, vol. 6, p. 117, Dar al-Adwa, Beirut 1992
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