Matthew 13:51
Have you understood all these things? They said to him: yes. The disciples' confirmation of understanding — yes — is the good-soil response that the Parable Discourse has been teaching toward. The confirmation of understanding is the fulfillment of verse 23: the one who hears the word and understands it bears fruit. The disciples who have understood these things are positioned to be the scribes trained for the kingdom that the next verse describes.