'Seven' in the Bible

There was one Anna, a prophetess, the daughter of Phanuel, of the tribe of Asher (she was of a great age, having lived with a husband seven years from her virginity,

and certain women who had been healed of evil spirits and infirmities: Mary who was called Magdalene, from whom seven demons had gone out;

Then he goes, and takes seven other spirits more evil than himself, and they enter in and dwell there. The last state of that man becomes worse than the first."

If he sins against you seven times in the day, and seven times returns, saying, 'I repent,' you shall forgive him."

There were therefore seven brothers. The first took a wife, and died childless.

The third took her, and likewise the seven all left no children, and died.

Therefore in the resurrection whose wife of them will she be? For the seven had her as a wife."