'Seventh' in the Bible

So all the men gathered together to meet with King Solomon at the Festival of Tents in the month Ethanim, the seventh month.

But Elijah told him to go back seven times. On the seventh look, he said, "Look! There's a cloud, a small one, about the size of a man's hand. It's coming up out of the sea!" "Get up and find Ahab!" Elijah said. "Tell him, "Mount your chariot and ride down the mountain so the storm doesn't stop you.'"

So they remained in opposing camps for seven days. Then on the seventh day the battle commenced, and the Israelis killed 100,000 Aramean infantry troops in a single day.