Bible Verses About Walls: Danger of approaching too near to, in time of war

it shall be that, if the king’s wrath arise, and he asks you, ‘Why did you go so near to the city to fight? Didn’t you know that they would shoot from the wall?

who struck Abimelech the son of Jerubbesheth? Didn’t a woman cast an upper millstone on him from the wall, so that he died at Thebez? Why did you go so near the wall?’ then you shall say, ‘Your servant Uriah the Hittite is dead also.’”