'Seven' in the Bible

And the time that David was king in Hebron over the house of Judah was seven years and six months.

In Hebron he reigned over Judah seven years and six months; and in Jerusalem he reigned thirty-three years over all Israel and Judah.

And David took from him one thousand seven hundred horsemen, and twenty thousand footmen; and David houghed all the chariot horses, but reserved of them for a hundred chariots.

And the Syrians fled before Israel; and David slew of the Syrians seven hundred in chariots, and forty thousand horsemen, and smote Shobach the captain of their host, who died there.

let seven men of his sons be given up to us, and we will hang them up to Jehovah in Gibeah of Saul, the chosen of Jehovah. And the king said, I will give them.

and he gave them into the hands of the Gibeonites, and they hanged them on the hill before Jehovah. And they fell all seven together, and were put to death in the first days of the harvest, in the beginning of barley harvest.

And Gad came to David, and told him, and said to him, Shall seven years of famine come to thee in thy land? or wilt thou flee three months before thine adversaries while they pursue thee? or shall there be three days' pestilence in thy land? Now be aware and consider what word I shall bring again to him that sent me.