'Ever' in the Bible

The leprosy therefore of Naaman shall cleave unto thee, and unto thy seed for ever. And he went out from his presence a leper as white as snow.

But it was not the Lord's purpose to send destruction on Judah, because of David his servant, to whom he had given his word that he would have a light for ever.

And the rules and the orders and the law which he put in writing for you, you are to keep and do for ever; you are to have no other gods.

Has any of the gods of the nations ever delivered his land from the power of the king of Assyria?

And he set a graven image of the grove that he had made in the house, of which the LORD said to David, and to Solomon his son, In this house, and in Jerusalem, which I have chosen out of all tribes of Israel, will I put my name for ever:

Josiah also defiled Topheth, which is in the Valley of Ben-hinnom (son of Hinnom), so that no man could make his son or his daughter pass through the fire [as a burnt offering] for Molech.

No such Passover had ever been kept from the time of the judges who judged Israel through the entire time of the kings of Israel and Judah.