'Seven' in the Bible

On the seventh day, when the king’s heart was joyful with wine (in high spirits), he commanded Mehuman, Biztha, Harbona, Bigtha, Abagtha, Zethar, and Carkas, the seven eunuchs who served in the presence of King Ahasuerus [as his attendants],

and who were close to him [as advisors]: Carshena, Shethar, Admatha, Tarshish, Meres, Marsena, and Memucan, the seven officials of Persia and Media who had access to the king and were ranked highest in the kingdom.

Now the young woman pleased Hegai and found favor with him. So he quickly provided her with beauty preparations and her [portion of] food, and he gave her seven choice maids from the king’s palace; then he transferred her and her maids to the best place in the harem.