Yeshayah 55:10-11

For as the geshem cometh down, and the sheleg (snow) from Shomayim, and returneth not to there, but watereth ha'aretz, and maketh it yield forth v'hitzmicha (and sprout, spring up; Tzemach), that it may give zera to the zore'a (sower), and lechem to the eater; So shall My Davar (the Word of HASHEM) be that goeth forth out of My mouth; He shall not return unto Me reikam (empty, void) but He shall do that which I please, and He shall accomplish the purpose whereto I sent Him.