Judges 14:12-13

12And Samson said to them, Let me now propound a riddle to you; if ye clearly explain it to me within the seven days of the feast, and find [it] out, then I will give you thirty shirts, and thirty changes of garments.

13But if ye cannot explain [it] to me, then shall ye give me thirty shirts, and thirty changes of garments. And they said to him, Propound thy riddle, that we may hear it.