However, it is thought that he would not then have made his escape, had not fresh horsemen come from Parmenio summoning Alexander to his aid, on the ground that a large force of the enemy still held together there and would not give ground. For there is general complaint that in that battle Parmenio was sluggish and inefficient, either because old age was now impairing somewhat his courage, or because he was made envious and resentful by the arrogance and pomp, to use the words of Callisthenes, of Alexander's power.
Edition :
Plutarch. Plutarch's Lives. with an English Translation by. Bernadotte Perrin. Cambridge, MA. Harvard University Press. London. William Heinemann Ltd. 1919. 7.