Charles Ellicott Commentary Matthew 9:28

"And when he was come into the house, the blind men came to him: and Jesus saith unto them, Believe ye that I am able to do this? They say unto him, Yea, Lord." — Matthew 9:28 (ASV)

Into the house — The article indicates the specific house where He was staying in Capernaum, probably St. Peter’s.

Do you believe that I am able to do this? — The cry, Have mercy on us, had implied the request that He would restore their sight. In this case, as in others, faith was the antecedent condition of the miracle.