“He asked them.
‘But who do you say
That I am?’
καὶ αὐτὸς ἐπηρώτα αὐτούς Ὑμεῖς δὲ τίνα με λέγετε εἶναι;
This same question can be found in Matthew, chapter 16:15, and Luke, chapter 9:20. Mark said that Jesus was questioning his disciples (καὶ αὐτὸς ἐπηρώτα αὐτούς) who was it that they thought or said that he was (Ὑμεῖς δὲ τίνα με λέγετε εἶναι). Jesus thus put them to the test. This was not about what others said or thought, but about their understanding of Jesus. Who did they think Jesus was?