17.3
And when Pausanias came up and told him that their action had been formally voted by the Hellenes in council, Amompharetus picked up a great stone and threw it down at the feet of Pausanias, saying that was his personal ballot for battle, and he cared not a whit for the cowardly counsels and votes of the rest. Pausanias, perplexed at the case, sent to the Athenians, who were already moving off, begging them to wait and make the march in company with him, and then began to lead the rest of his troops toward Plataea, with the idea that he would thus force Amompharetus from his position.
17.4
At this point day overtook them, and Mardonius, who did not fail to notice that the Hellenes had abandoned their encampment, with his force in full array, bore down upon the Lacedaemonians, with great shouting and clamor on the part of the Barbarians, who felt that there would be no real battle, but that the Hellenes had only to be snatched off as they fled. And this lacked but little of coming to pass.
17.5
For Pausanias, on seeing the situation, though he did check his march and order every man to take post for battle, forgot, either in his rage at Amompharetus or his confusion at the speed of the enemy, to give the signal for battle to the confederate Hellenes. For this reason they did not come to his aid at once, nor in a body, but in small detachments and straggling, after the battle was already joined.