'Seven' in the Bible

At that time Solomon observed the feast for seven days, and all Israel with him, a very large assembly, from the entrance of Hamath to the Brook of Egypt.

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

Have you not driven out the priests of the Lord, the sons of Aaron and the Levites, and made priests for yourselves like the peoples of other lands? So whoever comes to consecrate himself with a young bull and seven rams, even he may become a priest of non-existent gods (idols).

Joash was seven years old when he became king, and he reigned for forty years in Jerusalem. 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. He commanded the priests, the sons of Aaron, to offer them on the altar of the Lord.

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

Then the whole assembly decided to celebrate [the feast] for another seven days; and they celebrated it another seven days with joy.

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