Final answer:
Polydamas advised the Trojan soldiers to not pursue the Greeks and to take caution during the night.
Step-by-step explanation:
The advice given by Polydamas to the Trojan soldiers that night was to not pursue the Greeks and to take caution. He warned them that the Greeks could be setting a trap and it would be more prudent to stay within the safety of their city walls. Polydamas believed that the Trojans should wait for the next day and fight defensively.