There is a play upon the word, three times repeated, which means both “an ass” and also “a heap.” The spirit of riddle-making Judges 14:12, Judges 14:18 is apparent in this song of triumph (compare Judges 5:1; Exodus 15:1; 1 Samuel 18:6-7).
Related Commentaries of Judges 15:16
Judges 15:16
16 And Samson said, With the jawbone of an ass, heaps upon heaps, with the jaw of an ass have I slain a thousand men.