In Matthew 13:36, the disciples also ask 'Declare unto us the parable' — showing a consistent request for private explanation.

Mark 4:34 explains Jesus' habit of expounding parables privately — the reason why Peter's request is granted.

Mark 7:17 records the same event — disciples asking about the parable of defilement in the house.

Mark 4:13 has Jesus rebuking disciples for not understanding parables — highlighting their ongoing struggle.

Luke 8:9 presents a similar request for parable explanation — the disciples ask about the sower parable.