30 And this thing became a sin; the people came to worship the one at Bethel and went as far as Dan to worship the other.a

Read 1 Kings 12:30 Using Other Translations

And this thing became a sin: for the people went to worship before the one, even unto Dan.
Then this thing became a sin, for the people went as far as Dan to be before one.
But this became a great sin, for the people worshiped the idols, traveling as far north as Dan to worship the one there.