John Gill Commentary Matthew 13:36

"Then he left the multitudes, and went into the house: and his disciples came unto him, saying, Explain unto us the parable of the tares of the field." — Matthew 13:36 (ASV)

Then Jesus sent the multitude away
That his disciples might have the opportunity of conversing with him alone, about the sense of the parables he had delivered; and that he might instruct them by some others hereafter mentioned.

And went into the house :
left the ship in which he had been preaching to the multitude, came on shore, and returned to the house he came out of, (Matthew 13:1)

and his disciples came to him ;
and being alone, make an humble request to him,

saying, declare unto us the parable of the tares of the field :
by which they mean, not a rehearsal of it, but an explication of the sense and meaning of it: they ask nothing about the parables of the mustard seed and leaven, either because they better understood them; or because there were some things very remarkable and striking in this, which made them very desirous to be particularly informed of the several parts of it, and their meaning.