'Seven' in the Bible

So Solomon observed the feast at that time for seven days, and all Israel with him, a very great assembly who came from the entrance of Hamath to the brook of Egypt.

On the eighth day they held a solemn assembly, for the dedication of the altar they observed seven days and the feast seven days.

Have you not driven out the priests of the Lord, the sons of Aaron and the Levites, and made for yourselves priests like the peoples of other lands? Whoever comes to consecrate himself with a young bull and seven rams, even he may become a priest of what are no gods.

Joash was seven years old when he became king, and he reigned forty years in Jerusalem; and his mother’s name was Zibiah from Beersheba.

They brought seven bulls, seven rams, seven lambs and seven male goats for a sin offering for the kingdom, the sanctuary, and Judah. And he ordered the priests, the sons of Aaron, to offer them on the altar of the Lord.

The sons of Israel present in Jerusalem celebrated the Feast of Unleavened Bread for seven days with great joy, and the Levites and the priests praised the Lord day after day with loud instruments to the Lord.

Then Hezekiah spoke encouragingly to all the Levites who showed good insight in the things of the Lord. So they ate for the appointed seven days, sacrificing peace offerings and giving thanks to the Lord God of their fathers.

Then the whole assembly decided to celebrate the feast another seven days, so they celebrated the seven days with joy.

Thus the sons of Israel who were present celebrated the Passover at that time, and the Feast of Unleavened Bread seven days.