History of the Peloponnesian War

Meanwhile Brasidas, afraid of succors arriving by sea from Thasos, and learning that Thucydides possessed the right of working the gold mines in that part of Thrace, and had thus great influence with the inhabitants of the continent, hastened to gain the town, if possible, before the people of Amphipolis should be encouraged by his arrival to hope that he could save them by getting together a force of allies from the sea and from Thrace, and so refuse to surrender.

He accordingly offered moderate terms, proclaiming that any of the Amphipolitans and Athenians who chose, might continue to enjoy their property with full rights of citizenship; while those who did not wish to stay had five days to depart, taking their property with them.