Submitting the banner to `Ali...

Submitting the banner to `Ali, the Holy Prophet ordered him, “Move towards them; as soon as you arrive at their castle, invite them to Islam and remind them of their rights. I swear to God that to conduct one person to the truth is better for you than having red-haired camels.”[^14] Imam `Ali headed for the mission; he could kill Marhab through a heroic encounter in which Imam `Ali showed a unique bravery. He then could conquer that castle.

Attacking the castles of Khaybar, which were centers of conspiracy against Islam, shows a number of important matters some of which are as follows: (1) This shows that the Holy Prophet enjoyed an effective management when he chose the quite…