When the group reaches Micah’s house, a light goes on in the minds of the spies (or, more likely, they were eagerly leading the company to this particular location), where they think, We will need to set up a shrine in our new land, and we will need some idols for that, and what would be more handy than having this shrine that has already given us one favourable oracle?
So they make sure the Danite company knows what is in Micah’s house, that it is filled with idols and an ephod.
14 Then the five men who had gone to scout out the country of Laish said to their brothers, “Do you know that in these houses there are an ephod, household gods, a carved image, and a metal image? Now therefore consider what you will do.”