The Prophet Muhammad (SAWA) did mention the names of all the twelve Imams (AS) as the real successors of the Prophet who will lead and guide the whole world as the Prophet was leading and guiding. As Allah (SWT) Has ordered us to obey Him, the Prophet and our divine leaders, Infallibility is necessary for them otherwise how can we obey Allah in obeying a person who can commit sins, which leads us to sinning which is against the obedience of Allah.

'Every infallible Imam has clearly mentioned who will be the Imam after him, which keeps the whole chain of Imams fully authentic and all of them are infallible.

'Wassalam.