Because they obeyed not the voice of the LORD their God, but transgressed his covenant, [and] all that Moses the servant of the LORD commanded, and would not hear [them], nor do [them].
Berean Study Bible (BSB) - 2 Kings 18:12 >This happened because they did not listen to the voice of the LORD their God, but violated His covenant—all that Moses the servant of the LORD had commanded—and would neither listen nor obey.