This Bible contradiction is from the Skeptic's Annotated Bible.

Verses

Two.

Matthew 20:30 View context

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.

Only one.

Mark 10:46 View context

And they came to Jericho: and as he went out of Jericho with his disciples and a great number of people, blind Bartimaeus, the son of Timaeus, sat by the highway side begging.

Luke 18:35 View context

And it came to pass, that as he was come nigh unto Jericho, a certain blind man sat by the way side begging: