'By our gods!' swore the Infidels, 'this is a trick that Arabs never play!' They sought for a spot where the moat was the most narrow, and savagely spurring on their steeds, they lifted them in fantastic jumping efforts and so reached the other side. Ali, followed by a few soldiers, went out to meet them. Getting between them and the ditch, he cut off their retreat. One of the men on horseback, Amr ibn Abd-i-Aud, of frightful aspect and gigantic stature, howled the vilest curses and challenged the Believers to single combat. With the permission of the Prophet who buckled on his own breastplate, rolled his turban round his head and placed his sword in his hand, Ali stood face to face with the giant. At the sight of his assailant, only a boy, Amr, the terrible, made a gesture of scorn and pity. 'I am loth to shed thy blood,' he said, 'for thy father was my friend '--'As for me,' retorted Ali, 'I shall have no compunction in shedding thine.' At these words, Amr foamed with rage, and Ali bade him remark that if he despised his young adversary, he did not disdain to profit by remaining on horseback to defend himself against an enemy on foot. Amr jumped off his horse and hamstrung it; thereby showing that he did not wish to use it for fight or flight. Mad with rage at the mocking challenge of so youthful a foe, he beat his own face with his clenched fists.... Then he rushed at Ali, aiming a fierce blow which glanced lightly off the lad's forehead, after having smashed his shield to pieces. As quick as lightning, Ali sprung on one side and, by an unexpected bound, got behind his adversary. Carried forward by the violence of his advance, the monster was bewildered and staggered when he tried to turn round. Ali seized the opportunity at once and made a skilful thrust. The blade pierced Amr's throat, through and through, cutting the carotid artery. An enormous gush of blood spurted from the gaping wound; like a drunken man, the colossus, with hoarse hiccoughs proceeding from his severed throat, made a few faltering steps and fell in a heap at the feet of Islam's champion. At this sight, the Mussulmans sang the "Takbir," and the other Infidels, overwhelmed by consternation, fled at a wild gallop. One of them, Nuhfil ibn Abdullah, having miscalculated his jump, rolled with his mount down into the ditch, where he was slowly being killed by showers of stones, when Zubayr put an end to the torture by a cut from his scimitar, which after having cleft his body in twain, was stopped by the saddle.