Though ye have done this. — The rendering of these words is involved in the same obscurity as other details of the narrative. They may mean, “If ye act thus, then will I be avenged on you before I have done;” and perhaps the verse implies, “as long as you avenge yourselves, I mean to retaliate.”
Related Commentaries of Judges 15:7
Judges 15:7
7 And Samson said unto them, Though ye have done this, yet will I be avenged of you, and after that I will cease.