This Bible contradiction is from the Infidels.org.

Verses

Matthew 26:34 View context

Jesus said unto him, Verily I say unto thee, That this night, before the cock crow, thou shalt deny me thrice.

Mark 14:30 View context

And Jesus saith unto him, Verily I say unto thee, That this day, [even] in this night, before the cock crow twice, thou shalt deny me thrice.