Isaiah 55:10-11 ...[11] so is my word that goes out from my mouth: It will not return to me empty, but will accomplish what I desire and achieve the purpose for which I sent it.
There is irresistible supernatural power in God's word; it will not return to Him empty.

God’s Word will accomplish His desires and purposes. The King James Version descriptively says that the word of the Lord will not return void to Him (Isaiah 55:11). In other words, it will get the job done!