'Seventh' in the Bible

On the seventh day, when the king's heart was merry with wine, he commanded Mehuman, Biztha, Harbona, Bigtha, and Abagtha, Zethar, and Carcas, the seven chamberlains that served in the presence of king Ahasuerus,

So Esther was taken to king Ahasuerus, into his royal house, in the tenth month, that is, the month Tebeth, in the seventh year of his reign.