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31He set another parable before them, saying, "The Kingdom of Heaven is like a grain of mustard seed, which a man took, and sowed in his field; 32which indeed is smaller than all seeds. But when it is grown, it is greater than the herbs, and becomes a tree, so that the birds of the air come and lodge in its branches."
34Jesus spoke all these things in parables to the multitudes; and without a parable, he didn`t speak to them, 35that it might be fulfilled which was spoken through the prophet, saying, "I will open my mouth in parables; I will utter things hidden from the foundation of the world."
36Then Jesus sent the multitudes away, and went into the house. His disciples came to him, saying, "Explain to us the parable of the darnel of the field." 37He answered them, "He who sows the good seed is the Son of Man, 38the field is the world; and the good seed, these are the sons of the kingdom; and the darnel are the sons of the evil one. 39The enemy who sowed them is the devil. The harvest is the end of the age, and the reapers are angels. 40As therefore the darnel is gathered up and burned with fire; so will it be in the end of this age. 41The Son of Man will send forth his angels, and they will gather out of his kingdom all things that cause stumbling, and those who do iniquity, 42and will cast them into the furnace of fire. There will be weeping and the gnashing of teeth.
Matthew 13:30-42 (WEB)