‘And the Spirit of Yahweh began to move him in Mahaneh-dan (‘the camp of Dan'), between Zorah and Eshtaol.' The place was called ‘the camp of Dan' because it was there that the Danites who had previously moved to Laish encamped at the commencement of their journey (Judges 18:12). It was close to Kiriath-jearim (city of forests) on the Judah/Benjaminite border.
“The Spirit of Yahweh began to move (disquiet) him.” Compare Judges 14:4. Perhaps the memory of the great trek of his ancestors stirred his spirit. As a result of the work of the Spirit within he became disquieted and dissatisfied, and the surprising result was that he sought a Philistine wife. But it may well be that this move was a part of his personal campaign against the Philistines, for in order to attack them without bringing their wrath on Israel he knew that he would have to become familiar with them and find personal reasons for attacking them.