Charles Ellicott Commentary 2 Samuel 4:3

"and the Beerothites fled to Gittaim, and have been sojourners there until this day)." — 2 Samuel 4:3 (ASV)

Fled to Gittaim. —Neither the cause of their flight, nor the place to which they fled, can be certainly determined. The Beerothites here appear to be from the tribe of Benjamin, and it is probable that they fled from the incursions of the Philistines, and that Gittaim is the place mentioned in Nehemiah 11:35 as occupied by the Benjamites returning from Babylon. The expression “until this day” makes it likely that the time of the writer was not very far removed from the events which he relates.