'Seven' in the Bible

Those who were full must hire themselves out for bread, but those who are hungry will become fat. As for the infertile, she will bear seven, but [she who has] many sons withers away.

Now the ark of Yahweh had been in the territory of [the] Philistines [for] seven months,

Then you will go down before me to Gilgal. Look, I am coming down to you to offer burnt offerings {and to make} fellowship offerings. You must wait seven days until I come to you. Then I will let you know what you should do."

So the elders of Jabesh said to him, "Leave us alone for seven days so that we may send messengers in all the territory of Israel, and if there [is] no deliverer for us, then we will come out to you."

He waited seven days according to the appointed time Samuel determined, but Samuel did not come to Gilgal, and {the army started to slip away from him}.

And Jesse made seven of his sons pass before Samuel, but Samuel said to Jesse, "Yahweh has not chosen any of these."

Then they took their bones and buried [them] under the tamarisk in Jabesh, and they fasted [for] seven days.