'Walls' in the Bible

He is to determine if the contagion is indeed on the walls of the house, with greenish or reddish streaks, and to determine if it appears to be deeper than the surface of the wall.

He is to return after seven days to examine it. If the contagion has spread to the walls of the house,

However, the houses in the villages that don't have walls around them are to be categorized along with the fields of the land they may be redeemed and returned in the jubilee.