After this deed they waited two days more, neither side desiring to begin the battle, for although the barbarians came to the Asopus to test the Greeks intent, neither army crossed it. Mardonius' cavalry, however, kept pressing upon and troubling the Greeks, for the Thebans, in their zeal for the Persian part, waged war heartily, and kept on guiding the horsemen to the encounter; thereafter it was the turn of the Persians and Medes, and they and none other would do deeds of valor.