
Operations against The Banu Quraitza Jews in 5 A. H.
The Jewish tribe of Banu Quraitza had settled towards. the eastern sector of Medina in a fortified stronghold. They had gone against the Medina Charter, which they had signed. They had entered into a secret treaty with Abu Sufyan and helped him against the Muslims in the battle of ‘Khandaq’.
Soon after his return from the entrenchment, while laying aside his armour, the Prophet was washing his hands and face in the house of his beloved daughter Fatima, whom he used to visit before proceeding to his house on return from an expedition or excursion, the Angel Gabriel brought him a command to proceed immediately against the Quraitza Jews.
The Prophet instantly sent Ali with his Standard, and he himself with his army followed him and laid siege to the fortress of the Jews. The siege lasted twenty-five days, and Ali who was in command, reduced them to such a state that starvation stared them in the face. He then led the assault on their stronghold, capturing it so quickly that he was able to offer his afternoon prayers in the compound of the citadel.

Operations against The Banu Mustaleq: 6 A. H.
The Jewish tribe of Banu Mustaleq had settled down in a neighbouring province of Medina. The Prophet having received intelligence of their activities, sent Boreida b. Al Hasib to ascertain the truth about their meditated raid on Medina.
Boreida confirmed the news upon his return, and the Prophet marched on them on the 2nd Shaban, 6 A. H. with Ali as his standard bearer. The Muslim army was able to advance far into their territory without any opposition, for Ali’s reputation as a warrior had preceded him, striking terror into the hearts of the tribesmen who fled from the approaching army. All the warriors of the Banu Khuzza fled, leaving the Banu Mustaleq to face the army of the Holy Prophet on their own.
In the single combats that were fought, Ali crossed swords with Quttada the Jewish leader of the tribe and killed him. Another Jewish warrior, Malik, confronted Ali, and he too was quickly disposed ofl. After Malik, his son came out to avenge the death of his father, but met the same fate. This completely disheartened the Jews, and they laid down their arms and agreed to pay tribute.

