Read Isaiah 55:11 Using Other Translations
So shall my word be that goeth forth out of my mouth: it shall not return unto me void, but it shall accomplish that which I please, and it shall prosper in the thing whereto I sent it.
so shall my word be that goes out from my mouth; it shall not return to me empty, but it shall accomplish that which I purpose, and shall succeed in the thing for which I sent it.
It is the same with my word. I send it out, and it always produces fruit. It will accomplish all I want it to, and it will prosper everywhere I send it.