'Seven' in the Bible

And they observed the Feast of Unleavened Bread seven days with joy, for the Lord had caused them to rejoice, and had turned the heart of the king of Assyria toward them to encourage them in the work of the house of God, the God of Israel.

Forasmuch as you are sent by the king and his seven counselors to inquire concerning Judah and Jerusalem according to the law of your God which is in your hand,