Plutarch Caesar 66

[1] So far, perhaps, these things may have happened of their own accord; the place, however, which was the scene of that struggle and murder, and in which the senate was then assembled, since it contained a statue of Pompey and had been dedicated by Pompey as an additional ornament to his theatre, made it wholly clear that it was the work of some heavenly power which was calling and guiding the action thither.

[2] Indeed, it is also said that Cassius, turning his eyes toward the statue of Pompey before the attack began, invoked it silently, although he was much addicted to the doctrines of Epicurus; ¹ but the crisis, as it would seem, when the dreadful attempt was now close at hand, replaced his former cool calculations with divinely inspired emotion.

[3]
  Well, then, Antony, who was a friend of Caesar’s and a robust man, was detained outside by Brutus Albinus, ² who purposely engaged him in a lengthy conversation but Caesar went in, and the senate rose in his honour. Some of the partisans of Brutus took their places round the back of Caesar’s chair, while others went to meet him, as though they would support the petition which Tillius Cimber presented to Caesar in behalf of his exiled brother, and they joined their entreaties to his and accompanied Caesar up to his chair.

[4] But when, after taking his seat, Caesar continued to repulse their petitions, and, as they pressed upon him with greater importunity, began to show anger towards one and another of them, Tillius seized his toga with both hands and pulled it down from his neck. This was the signal for the assault. It was Casca who gave him the first blow with his dagger, in the neck, not a mortal wound, nor even a deep one, for which he was too much confused, as was natural at the beginning of a deed of great daring; so that Caesar turned about, grasped the knife, and held it fast.

[5] At almost the same instant both cried out, the smitten man in Latin: Accursed Casca, what doest thou? and the smiter, in Greek, to his brother: Brother, help!.
  So the affair began, and those who were not privy to the plot were filled with consternation and horror at what was going on; they dared not fly, nor go to Caesar’s help, nay, nor even utter a word. But those who had prepared themselves for the murder bared each of them his dagger,

[6] and Caesar, hemmed in on all sides, whichever way he turned confronting blows of weapons aimed at his face and eyes, driven hither and thither like a wild beast, was entangled in the hands of all; for all had to take part in the sacrifice and taste of the slaughter. Therefore Brutus also gave him one blow in the groin. And it is said by some writers that although Caesar defended himself against the rest and darted this way and that and cried aloud, when he saw that Brutus had drawn his dagger, he pulled his toga down over his head and sank,

[7] either by chance or because pushed there by his murderers, against the pedestal on which the statue of Pompey stood. And the pedestal was drenched with his blood, so that one might have thought that Pompey himself was presiding over this vengeance upon his enemy, who now lay prostrate at his feet, quivering from a multitude of wounds. For it is said that he received twenty-three; and many of the conspirators were wounded by one another, as they struggled to plant all those blows in one body.