'Seventh' in the Bible

Speak unto all the people of the land, and to the priests, saying, When ye fasted and mourned in the fifth and seventh month, even those seventy years, did ye at all fast unto me, even to me?

When ye fasted with mourning in the fifth and in the seventh months -- even these seventy years -- did ye keep the fast to Me -- Me? And when ye eat, and when ye drink, is it not ye who are eating, and ye who are drinking?

Thus saith the LORD of hosts; The fast of the fourth month, and the fast of the fifth, and the fast of the seventh, and the fast of the tenth, shall be to the house of Judah joy and gladness, and cheerful feasts; therefore love the truth and peace.