Judges 13:17

What is thy name? Manoah was becoming increasingly uncertain about the nature or identity of the mysterious Messenger who had made the remarkable promise to them. His refusal to eat food and the suggestion that they offer a sacrifice puzzled Manoah to the extent that he put a direct question to Him, hoping to learn His identity.

Do thee honour. If the word of the Messenger should come true, Manoah and his wife would want to honor Him in a special way — perhaps by naming the child after Him, or by publishing abroad His prophetic power, or by a gift. As it was, they did not even know who He was, and so could not hope to honor Him later.