The troops deserted Fustat in a panic, and the women of the city, running out of their houses, implored the sherif to intercede with the conqueror.

According to the story, the Caliph called a great assembly of the people, and invited the sherifs to appear; then, half drawing his sword, he said: "Here is my pedigree," and scattering gold among the spectators, added, "and there is my proof.