he cut down: This could have no natural tendency to raise the iron and cause it to swim. It was only a sign, or ceremony, which the prophet chose to employ on the occasion. 2 Kings 2:21, 2 Kings 4:41; Exodus 15:25; Mark 7:33-34, Mark 8:23-25; John 9:6-7
the iron: This was the real miracle; for the gravity of the metal must otherwise still have kept it at the bottom of the river.