'Seven' in the Bible

So the king of Israel went with the king of Judah and the king of Edom. They made a circuit of seven days’ journey, but there was no water for the army or for the cattle that followed them.

Then he returned and walked in the house once back and forth, and went up [again] and stretched himself out on him; and the boy sneezed seven times and he opened his eyes.

Elisha sent a messenger to him, saying, “Go and wash in the Jordan seven times, and your flesh will be restored to you and you will be clean.”

So he went down and plunged himself into the Jordan seven times, just as the man of God had said; and his flesh was restored like that of a little child and he was clean.

Now Elisha had said to the [Shunammite] woman whose son he had restored to life, “Prepare and go, you and your household, and stay temporarily wherever you can; for the Lord has called for a famine, and moreover, it will come on the land [and continue] for seven years.”

So the woman set out and did everything in accordance with the word of the man of God. She and her household went and stayed temporarily as foreigners in the land of the Philistines for seven years.

At the end of the seven years the woman returned from the land of the Philistines; and she went to appeal to the king [of Israel] for her house and for her land.

Jehoash (Joash) was seven years old when he became king.