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

Verses

In the time of Abraham.

Genesis 14:14 View context

And when Abram heard that his brother was taken captive, he armed his trained [servants], born in his own house, three hundred and eighteen, and pursued [them] unto Dan.

After the massacre of Laish.

Judges 18:29 View context

And they called the name of the city Dan, after the name of Dan their father, who was born unto Israel: howbeit the name of the city [was] Laish at the first.