Jamieson, Fausset and Brown on Judges 14:10-11

10-11. his father went down--The father is mentioned as the head and representative of Samson's relatives.

Samson made there a feast--The wedding festivity lasted a week. The men and women were probably entertained in separate apartments--the bride, with her female relatives, at her parents' house; Samson, in some place obtained for the occasion, as he was a stranger. A large number of paranymphs, or "friends of the bridegroom," furnished, no doubt, by the bride's family, attended his party, ostensibly to honor the nuptials, but really as spies on his proceedings.