Mufazzal b. Umar asked the Imam (a.s.) – O Son of Allah’s Prophet! Please inform me about the meaning of the following words of Allah, ‘And he made it a word to continue in his posterity that they may return’ (Surah Zukhruf (43): 28

The Imam (a.s.) informed – This implies that Allah established divine authority (Wilayat) in the progeny of Husain (a.s.) up until the Resurrection Day.