And when Jesus departed thence - The scene of this miracle was near Capernaum. The blind men probably followed him with their cry for aid immediately on his leaving the house of Jairus.
Thou Son of David - By the Son of David the Jews meant the Messiah. He was the descendant or Son of David by way of eminence, Isaiah 9:7; Luke 1:32; Revelation 22:16. See the notes at Matthew 1:1. This was therefore a profession of belief, on the part of these blind men, of the Messiahship of Jesus, and, at the same time, the expression of a belief that, being the Messiah, he could heal them.
Have mercy on us - That is, show compassion toward us in our affliction, and restore to us the blessing of sight.