two blind men. There are no "discrepancies" between this account and those of Mark 10:46 and Luke 18:35. They describe three miracles on four blind men: one on approaching Jericho; one on leaving; two after He had left. See App-152.
Sitting. Not "begging", as in Luke 18:35.
by. beside. Greek. par a. App-104. The others were at each gate.
passed by. is passing by.
mercy. pity.
Lord. App-98.
Son of David. Therefore Israelites, having. claim on Him as such. The fifth of nine occurrences of this title in Matthew. See note on Matthew 1:1, and App-98.