After all...

After all, our brothers from the Ahl al-Sunnah claim that the Messenger died without designating any heir, inheritor or successor. In cases like that, it is the deputy commander-in-chief (i.e. the wazir ) who automatically succeeds the dead commander-in-chief (i.e. the amir )! Apart from being the deputy leader of the nation, and the deputy commander-in-chief of the armed forces, the wazir also functions as the chief adviser and helper of the ruler. Imam Ibn Hibban (d.

354 H) records: أخبرنا الحسين بن عبد الله القطان قال حدثنا موسى بن مروان الرقي قال حدثنا الوليد عن زهير بن محمد عن عبد الرحمن بن القاسم عن أبيه عن عائشة قالت قال رسول الله صلى الله عليه وسلم إذا أراد الله بالأمير خيرا جعل له وزير صدق