Matthew 13:10
His disciples came up and said to him, "Why do you speak to them in figures?"
Mark 4:10
When he was by himself, those who stayed about him with the Twelve asked him about the figures he had used.
Mark 4:33-34
With many such figures he told them the message, as far as they were able to receive it.
Treasury of Scripture Knowledge
Summary
And the disciples came, and said unto him, Why speakest thou unto them in parables?