American Standard Version (ASV):
And behold, two blind men sitting by the way side, when they heard that Jesus was passing by, cried out, saying, Lord, have mercy on us, thou son of David.
King James Version (KJV):
And, behold, two blind men sitting by the way side, when they heard that Jesus passed by, cried out, saying, Have mercy on us, O Lord, [thou] Son of David.