Judges 14:17-18

She cried the whole seven days of the feast. So on the seventh day he finally told her, because she continued to press him. She in turn explained the riddle to her people. Before sunset on the seventh day the men of the town said to him, “What is sweeter than honey? What is stronger than a lion?” Samson said to them, “If you had not plowed with my heifer, you would not have solved my riddle.”