The Khalifah appoints a delegated assistant or more for himself, who carry the responsibilities of ruling. So he delegates to them the management of affairs, where they conduct them according to their opinion and Ijtihad. On the death of the Khalifah, the role of his assistants ends, and they do not continue in their work except for the period of the temporary leader.

The proof for this article is what Al-Tirmidhi narrated; the Messenger (pbuh) said.

. » وَأَمَّا وَزِيرَايَ مِنْ أَهْلِ الأَرْضِ فَأَبُو بَكْرٍ وعُمَرُ «.

“My two ministers in the World are Abu Bakr and Umar” (reported by Al-Hakim and Al-Tirmidhi from Abu Said Al-Khudri). This narration has been used by the Fuqaha’ and has been accepted by most of the scholars, so it is a Hasan narration and accordingly is a Shari’ah evidence that the Khalifah can appoint assistants. The narration used the word “minister” in the linguistic meaning, which is assistant, and the Quran uses it with this meaning; Allah (swt) said. “And appoint for me a minister from my family.” (TMQ 20:29), in other words, an assistant. And the ministry was present during the time of the Messenger (pbuh) , and its proof is the text of the narration from Al-Tirmidhi. However, it was the Messenger (pbuh) who was the one who ruled, and there is nothing which indicates that he made Abu Bakr (ra) and Umar (ra) carry out what he did from ruling, but making them into ministers indicates that he commissioned them to assist him; in other words, commission for both of them to carry out what he did from ruling. After the death of the Messenger (pbuh) , Umar (ra) was the minister of Abu Bakr (ra), and used to carry out what the Khalifah used to carry out in terms of ruling, and that was apparent to the point that some of them used to say to Abu Bakr (ra), “We don’t know whether Umar is the Khalifah or you” reported by Ibn Hanbal in Fada’il Al-Sahabah from Nafi’. After the death of Abu Bakr (ra), ’Uthman (ra) and ’Ali (ra) were the ministers of Umar (ra), and each of them carried out what Umar (ra) did in terms of ruling, except that the power of the personality of Umar (ra) meant that the actions of assistance of the two ministers were not so apparent as that of Umar (ra) with Abu Bakr (ra), although due to the power of the personality of ’Ali (ra), it was clear that he carried out these actions in the time of Umar (ra). After the death of Umar (ra), ’Ali (ra) and Marwan b. Al- Hakam (ra) were the two ministers of ’Uthman (ra). However, ’Ali (ra) was not content with some of the actions, and so his work with ’Uthman (ra) was not prominent since he was similar to someone withdrawn. On the other hand, Marwan (ra) was apparent in his undertaking of the ministry, in other words, the actions of ruling.