Matthew 13:10
And when his disciples came, they said to him, Why speakest thou to them in parables?
Mark 4:10
But when they were alone, those who were about him with the twelve, asked him the meaning of the parable.
Mark 4:33-34
And with many such like parables spake he to them the word.
Treasury of Scripture Knowledge
Summary
And the disciples came, and said unto him, Why speakest thou unto them in parables?