וַיְהִ֛י הַדָּבָ֥ר הַזֶּ֖ה לְחַטָּ֑את וַיֵּלְכ֥וּ הָעָ֛ם לִפְנֵ֥י הָאֶחָ֖ד עַד־דָּֽן׃
And this thing became a sin; for the people went to worship before the one, even unto Dan.
Rashi on I Kings
Even as far as Dan. At the end of the boundary of the land.6They were so attached to idol worship that they made the long pilgrimage from one end of the land all the way to the altar in Dan in the northernmost part of Yisroel.