what I tell you in the dark, you must utter in the open, what you hear in a whisper you must proclaim on the housetop.

a man on the housetop must not go down to fetch what is inside his house,

a man on the housetop must not go down into the house or go inside to fetch anything out of his house,

So all you utter in the dark will be heard in the light, and what you whisper in chambers will be proclaimed on the housetops,

On that day, if a man is on the housetop and his goods inside the house, he must not go down to fetch them out; nor must a man in the field turn back