2 Kings 2:21

And he went forth unto the spring of the waters,.... The fountain from whence they flowed, the head of them:

and cast the salt in there; which was an unlikely means of making bad water good, since that makes it brackish, and not so drinkable, and what makes ground barren; but this method, contrary to nature, was taken, that the miracle might appear the greater; or, as the Jews express it, be a miracle within a miracle:

and said, thus saith the Lord, I have healed these waters; he did not pretend to heal them in his own name, and by his own power, but in the name and by the power of the Lord, to whom he would have it ascribed:

there shall not be from thence any more death, or barren land; or miscarrying; no more noxious and mortal diseases should be got by drinking them, nor any abortions occasioned by them in women, cattle, and fruit trees, as had been.