'Seventh' in the Bible

“Say to all the people of the land and to the priests, ‘When you fasted and mourned in the fifth and seventh months these seventy years, was it actually for Me that you fasted?

“Thus says the Lord of hosts, ‘The fast of the fourth, the fast of the fifth, the fast of the seventh and the fast of the tenth months will become joy, gladness, and cheerful feasts for the house of Judah; so love truth and peace.’