Matthew 9:27

And as Jesus passed by from thence, two blind men followed him, crying out, and saying, Have mercy on us, thou Son of David.

As Jesus passed by ... (See under Matthew 9:9). The symbolism of this incident is magnificent. Although the learned Pharisees and doctors of religion could not see Christ as the Messiah, or Son of David, these blind people COULD! Even a blind man knew that the Messiah had indeed appeared in the person of Jesus Christ. Matthew alone recorded this incident. From various Old Testament passages, it is clear that blindness is a type of sin (See Deuteronomy 28:29; Isaiah 59:10; Job 12:25; Zephaniah 1:17; Isaiah 29:8; also Ephesians 5:8; and Matthew 15:14). A number of examples of Jesus' restoring sight to the blind are recorded and were prophetically included as a positive mark of the Messiah's power when he should be revealed. Isaiah said of the Messiah and his times, "Then the eyes of the blind shall be opened" (Isaiah 35:5).

The expression "Have mercy on us, thou Son of David" has seven words as do so many forceful expressions in Scripture. See other examples in Matthew 6:7,11,20,28,24 - all in a single chapter. Countless others may be noted in both the Old and New Testaments.