27 As Jesus passed by from there, two blind men followed him, calling out and saying, “Have mercy on us, son of David!”

28 When he had come into the house, the blind men came to him. Jesus said to them, “Do you believe that I am able to do this?”

They told him, “Yes, Lord.”

29 Then he touched their eyes, saying, “According to your faith be it done to you.” 30 Their eyes were opened. Jesus strictly commanded them, saying, “See that no one knows about this.” 31 But they went out and spread abroad his fame in all that land.

Matthew 9:27-31 - World English Bible

In verses that echoed the healing of blind Bartemaeus (Mark 10:46-52), Matthew presented two blind men who called out "Have mercy on us, Son of David." 9:27 set the stage for the cure with the number of blind men (two, the number of witnesses needed to present a claim in Jewish court) and the phrase "Son of David" (not referring to Davidic linage,per se, but to Solomon, the wisest of David's heirs). Two men sought sight by appealing to a title and, with a little reverse psychology, tried to force the hand of the Master through social embarrassment. Jesus preached God's wisdom, so, the logic goes, so he could prove that wisdom by healing the men. If he refused, he then had two detractors who could claim the man from Nazareth was a charlatan. But, if he did, he had two examples, two witnesses to the veracity of his power. He did give the men their sight, because of their faith (indeed, their chutzpa). Did that stop the story from spreading? No, of course not.

How has God healed you? How do you share that healing with others?