As we continue through the ninth chapter of the Book of Judges, we will continue to see an incidental use of the number 7, as it merely gives the number of Gideon’s sons, multiplied by ten, such as in the passage below,

So they gave him seventy shekels of silver from the temple of Baal-berith, with which Abimelech hired worthless and reckless men; and they followed him. Then he went to his father’s house at Ophrah and killed his brothers, the seventy sons of Jerubbaal, on one stone. But Jotham the youngest son of Jerubbaal was left, because he hid himself (Judges 9.4–5).