Albert Barnes Commentary Judges 14:20

"But Samson`s wife was [given] to his companion, whom he had used as his friend." — Judges 14:20 (ASV)

His companion - Perhaps one of those mentioned in (Judges 14:11). The transaction denotes loose notions of the sanctity of marriage among the Philistines. It should be noted carefully that the practical lesson against ungodly marriages comes out most strongly in this case, and that the providential purpose which, out of this evil, brought discomfiture to the Philistines, has nothing to do with the right or wrong of Samson’s conduct.