The Feast was probably the Passover, or one of the three great Jewish Feasts. In these unsettled times men went up to Shiloh (Seilun) only once a year 1 Samuel 1:3 instead of thrice; only the males kept the Feasts, and therefore the virgins of Shiloh would naturally be the only maidens present, and the public festival would be a likely occasion for their festive dances. It is, however, possible that some particular feast unique to Shiloh is meant, like the yearly sacrifice of David’s family in Bethlehem 1 Samuel 20:29.
Related Commentaries of Judges 21:19
Judges 21:19
19 Then they said, Behold, there is a feast of the LORD in Shiloh yearlyd in a place which is on the north side of Bethel, on the east side of the highway that goeth up from Bethel to Shechem, and on the south of Lebonah.