Matthew 13:10
And the disciples came, and said to him, "Why speakest thou to them in parables?"
Mark 4:10
And when he was alone, they that were about him with the twelve asked him of the similitude.
Mark 4:33-34
And with many such similitudes he preached the word unto them, after as they might hear it.
Treasury of Scripture Knowledge
Summary
And the disciples came, and said unto him, Why speakest thou unto them in parables?