'Seventh' in the Bible

On the seventh day, as the heart of the king is glad with wine, he hath said to Mehuman, Biztha, Harbona, Bigtha, and Abagtha, Zethar, and Carcas, the seven eunuchs who are ministering in the presence of the king Ahasuerus,

And Esther is taken unto the king Ahasuerus, unto his royal house, in the tenth month -- it is the month of Tebeth -- in the seventh year of his reign,