“Which indeed is the least of all seeds: but when it is grown, it is the greatest among herbs, and becometh a tree, so that the birds of the air come and lodge in the branches thereof.”
King James Version (KJV)
13:32 The least - That is, one of the least: a way of speaking extremely common among the Jews. It becometh a tree - In those countries it grows exceeding large and high. So will the Christian doctrine spread in the world, and the life of Christ in the soul.
Mt 13:32 Which indeed is the least of all seeds. The least of all the field or garden seeds sown in Palestine. But when it is grown, it is the greatest among herbs. All herbs cultivated in the fields or garden of Palestine. Dr. Hooker measured a mustard-plant in the Jordan Valley ten feet high. Thus, the kingdom, from an insignificant beginning, grows to a mighty magnitude. (See Mr 4:31,32).