For as the rain comes down, and the snow from heaven, and do not return there, but water the earth, and make it bring forth and bud, that it may give seed to the sower and bread to the eater, so shall My word be that goes forth from My mouth; It shall not return to Me void, but it shall accomplish what I please, and it shall prosper in the thing for which I sent it. Isaiah 55:10–11

And He said to them, “Go into all the world and preach the Gospel to every creature. He who believes and is baptised will be saved; but he who does not believe will be condemned.” Mark 16:15–16