'Forever' in the Bible

Therefore, the leprosy of Naaman shall cling to you and to your descendants forever.” So he went out from his presence a leper as white as snow.

The statutes and the ordinances and the law and the commandment which He wrote for you, you shall observe to do forever; and you shall not fear other gods.

Then he set the carved image of Asherah that he had made, in the house of which the Lord said to David and to his son Solomon, “In this house and in Jerusalem, which I have chosen from all the tribes of Israel, I will put My name forever.