2 Kings 4:41
threw <07993> [he cast.]
anything <01697> [there.]
anything <01697> [harm. Heb. evil thing.]
2 Kings 6:6
cut off <07094> [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.
ax head <01270> [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.