It happened on the seventh day, that they said to Samson's wife, Entice your husband, that he may declare to us the riddle, lest we burn you and your father's house with fire: have you called us to impoverish us? is it not [so]?
"If ye had not plowed with my heifer"  (Judges 14:18).  Samson, of course, knew instantly what had happened, and he moved at once to pay the thirty changes of raiment which he had promised in case they "solved" his riddle.