'Seventh' in the Bible

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]?"

She wept before him the seven days, while their feast lasted: and it happened on the seventh day, that he told her, because she pressed him severely; and she told the riddle to the children of her people.

The men of the city said to him on the seventh day before the sun went down, "What is sweeter than honey? What is stronger than a lion?" He said to them, "If you hadn't plowed with my heifer, you wouldn't have found out my riddle."