'Seventh' in the Bible

Then on the fourth day they said to Samson’s wife, “Persuade your husband to tell us [through you] the [answer to the] riddle, or we will burn you and your father’s household with fire. Have you invited us to make us poor? Is this not true?”

However Samson’s wife wept before him seven days while their [wedding] feast lasted, and on the seventh day he told her because she pressed him so hard. Then she told the [answer to the] riddle to her countrymen.

So the men of the city said to Samson on the seventh day before sundown,“What is sweeter than honey?What is stronger than a lion?”And he said to them,“If you had not plowed with my heifer,You would not have solved my riddle.”