Page "Rashidun" Paragraph 18

According to Shi ' a Islam, the first caliph should have been Ali followed by the Shi ' a Imams.

Shi ' a Muslims support this claim with the Hadith of the pond of Khumm.

Another reason for this support for Ali as the first caliph is because he had the same relationship to Muhammad as Aaron had to Moses.

Starting with Muhammad to Ali to the grandsons of Muhammad, Hasan ibn Ali and Husayn ibn Ali ( Muhammad had no surviving sons of his own ) and so on.