This Bible contradiction is from the Skeptic's Annotated Bible.
Laban was the son of Bethuel.
Genesis 28:5 View context
And Isaac sent away Jacob: and he went to Padan-aram unto Laban, son of Bethuel the Syrian, the brother of Rebekah, Jacob's and Esau's mother.
Laban was the son of Nahor.
Genesis 29:5 View context
And he said unto them, Know ye Laban the son of Nahor? And they said, We know [him].