By Allah that all Islamic commandments and limits (the Hudud) are in it...

By Allah that all Islamic commandments and limits (the Hudud) are in it, even the compensation fee for a scrape on the skin.”[^7] Abdullah Ibn ‘Atabah says, “I was with Husayn Ibn Ali (a.s.) when Ali Ibn Husayn (a.s.) came in. I asked Imam Husayn (a.s.), ‘If you pass away one day, who should we refer to?’ Imam (a.s.) answered, ‘Refer to this son of me.

He will be the Imam and the father of Imams.’”[^8] Mas’udi has written in his book ‘Ithbatul Wasilah, “In Karbala, Husayn (a.s.) called Ali Ibn Husayn (a.s.), who was sick, presented Allah’s Great Name and the legacy of the prophets (S) to him, and informed him that the Prophet’s books, sciences, and weapon are trusted to Umm Salamah and she will give all of them to him.”[^9] Sayyid Murtaza has written in ‘Uyunul Murtaza, “The narrators have narrated that Husayn Ibn Ali (a.s.) willed that Allah’s Great Name and the Prophet (S)’s legacy be given to his son Ali Ibn Husayn (a.s.).

Then Imam Husayn (a.s.) stated, ‘He will be the Imam after me.’”[^10] Muhammad Ibn Muslim says, “I asked Imam Sadiq (a.s.), ‘Where is the ring of Husayn Ibn Ali (a.s.)? I have heard that it was removed from his finger in Karbala.’ Imam (a.s.) replied, ‘That is not true.

Husayn (a.s.) willed to his son, Ali Ibn Husayn (a.s.), gave Ali his ring, and left the Imamate to Ali, just as the Messenger of Allah (S) did in case of Amiral Mu’minin (a.s.), Amiral Mu’minin (a.s.) did in case of his son Hasan, and Hasan did in case of his brother Husayn. After Ali Ibn Husayn (a.s.), Imam Husayn’s (a.s.) ring was given to my father and then to me. I wear it every Friday and perform prayers with it.’ I went to Imam Sadiq (a.s.) on Friday and found him performing prayers.

When his prayer finished, he stretched his hand toward me. I saw a ring in his holy finger with the sign: ‘There is no deity but Allah; preparation for meeting Allah.’ Then Imam (a.s.) said, ‘This is the ring of my grandfather, Husayn Ibn Ali (a.s.).’”[^11] The author of Kashful Ghummah has argued for the Imamate of Ali Ibn Husayn (a.s.) using some other reasons: First, Imam Sajjad (a.s.) was the most virtuous most knowledgeable of the people in his own age after his father.

Logically, when such a person exists, no other one can be the Imam. Second, it is proved using logical reasons and the traditions that the existence of Imam is necessary in all ages; the earth will never be void of Allah’s successor.