'Eighth' in the Bible

On the eighth day they held an assembly, for they had dedicated the altar for seven days and celebrated the festival for seven more days.

On the first day of the first month they began consecrating; by the eighth day of the month they reached the porch of the Lord's temple. For eight more days they consecrated the Lord's temple. On the sixteenth day of the first month they were finished.

In the eighth year of his reign, while he was still young, he began to seek the God of his ancestor David. In his twelfth year he began ridding Judah and Jerusalem of the high places, Asherah poles, idols, and images.