Mark 4:34

Without a parable he did not speak to them; but privately to his own disciples he explained everything.

John 16:25

I have spoken these things to you in figures of speech. But the hour is coming when I will no more speak to you in figures of speech, but will tell you plainly about the Father.

Matthew 13:36-43

Then Jesus sent the crowds away, and went into the house. His disciples came to him, saying, "Explain to us the parable of the tares in the field."

Matthew 15:15-20

Peter answered him, "Explain the parable to us."

Mark 4:10

And when he was alone, those who were around him with the twelve asked him about the parables.

Luke 24:27

Beginning from Moses and from all the prophets, he explained to them in all the Scriptures the things concerning himself.

Luke 8:9-10

Then his disciples asked him, "What does this parable mean?"

Luke 24:44-46

He said to them, "This is what I told you, while I was still with you, that all things which are written in the Law of Moses, the Prophets, and the Psalms, concerning me must be fulfilled."

Treasury of Scripture Knowledge

Summary

But without a parable spake he not unto them: and when they were alone, he expounded all things to his disciples.

Bible References

When

Mark 4:10
And when he was alone, those who were around him with the twelve asked him about the parables.
Matthew 13:36
Then Jesus sent the crowds away, and went into the house. His disciples came to him, saying, "Explain to us the parable of the tares in the field."
Matthew 15:15
Peter answered him, "Explain the parable to us."
Luke 8:9
Then his disciples asked him, "What does this parable mean?"
Luke 24:27
Beginning from Moses and from all the prophets, he explained to them in all the Scriptures the things concerning himself.

General references

Ezekiel 17:2
"Son of man, put forth a riddle, and speak a parable to the house of Israel;
Matthew 13:34
Jesus spoke all these things in parables to the crowds; and without a parable, he did not speak to them,
Matthew 22:1
Jesus answered and spoke again in parables to them, saying,
Mark 4:10
And when he was alone, those who were around him with the twelve asked him about the parables.