15th Sunday in Ordinary Time, Year A: 1st Reading

Isaiah 55:10-11

Thus says the LORD:
   Just as from the heavens
      the rain and snow come down
   and do not return there
      till they have watered the earth,
      making it fertile and fruitful,
   giving seed to the one who sows
      and bread to the one who eats,
   so shall my word be
      that goes forth from my mouth;
   my word shall not return to me void,
      but shall do my will,
      achieving the end for which I sent it.