In Mark 7:18, Jesus again rebukes disciples for lacking understanding, using a similar rhetorical question about defilement.

In Matthew 15:15-17, Peter asks for explanation of a parable, and Jesus rebukes them for not understanding—direct parallel to Mark's rebuke.

Matthew 13:3 is the parallel account of the parable of the sower, which Jesus is referring to when He asks about understanding.

In Matthew 13:51, Jesus asks a similar question about understanding, but here the disciples affirm understanding—contrasting with their confusion in Mark.

In John 16:25, Jesus speaks of using figures of speech, then promising plain speech — connecting to His use of parables here.