“But Peter said
‘Explain this parable
Ἀποκριθεὶς δὲ ὁ Πέτρος εἶπεν αὐτῷ Φράσον ἡμῖν τὴν παραβολήν.
This saying of Peter is unique to Matthew, emphasizing the role of Peter and his lack of faith and understanding. In Mark, chapter 7:17, the disciples in general and not Peter ask for an explanation of the parable. Peter may also have been speaking for the rest of the disciples, as their leader. Peter replied to Jesus (Ἀποκριθεὶς δὲ ὁ Πέτρος εἶπεν αὐτῷ). He wanted Jesus to explain this parable to his disciples (Φράσον ἡμῖν τὴν παραβολήν).