H. H. Hassan and H. A. Mambakr , Trans., “The moral contents in the wills of the Rightly Guided Caliphs and their princes - the Caliph of Abu Bakr Al-Siddiq (11-13 AH / 632-634 AD) as a model- a historical and analytical study”, Twejer Journal, vol. 7, no. 1, pp. 512–534, Jul. 2024, doi: 10.31918/twejer.2471.18.