Matthew 9:27

‘And as Jesus passed by from there, two blind men followed him, crying out, and saying, “Have mercy on us, you son of David.”

Not only is this a Messianic sign following closely on the previous one, and deliberately connected to it, but it is also a picture of what will follow the resurrection. Blind eyes will be opened to an acceptance of the Messiah. For it is those who ‘see' who are blessed (Matthew 13:16). And this will be because of the merciful response of ‘the Son of David' (see above and introduction).

For parallel appeals for merciful action see Matthew 15:22; Matthew 17:15; Matthew 20:30. It is made quite clear that the title Son of David is especially connected with exorcisms and the healing of the blind (Matthew 12:23; Matthew 15:22; Matthew 20:30; Matthew 21:9 with 14). This may well be because by the time of Jesus Solomon, the son of David, was famed for his powers of exorcism (see introduction under Titles of Jesus).

We need not assume that Jesus had ignored their pleas. He may well have been unaware of them (but see Matthew 15:23. He may have had the purpose in it of being able to speak to them privately). Or He may not have wanted to respond in an open way to that designation at this point in His ministry. It could have raised false expectations. The detail then assumes an eyewitness, something quite common in Matthew's Gospel. It is hardly likely to have been invented.