The Chachnāma (Fatḥnāma-yi Sind) 51: Muhammad 'Alláfi (an Arab mercenary,) goes against the chiefs of Ramal.

51

Muhammad 'Alláfi, an Arab of the Bani Asamat, who had killed 'Abdu-r Rahman son of Ash'ab, for having run away from battle, came to join Dahir with five hundred Arabs.
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The 'Alláfi made a night attack on the Ramal troops with his five hundred Arabs and warriors of Hind, and fell upon them on all four sides with a great shout, and killed and captured 80,000 warriors and fifty elephants, besides horses and arms innumerable fell into their hands.
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Dahir then told his good and judicious minister to ask a favour. The minister replied : "I have no son who will carry down my name to posterity. I request, therefore, that orders may be given to have my name stamped on the silver coin of the realm, so that my name being on one face, and the king's on the other, it will not then be forgotten in Hind and Sind." Dahir ordered that the minister's wish should be complied with.