'Perpetual' in the Bible

Thus saith the Lord Jehovah: Because the Philistines have dealt by revenge, and have taken vengeance with despite of soul to destroy with perpetual enmity;

Because thou hast had a perpetual enmity, and hast given over the children of Israel to the power of the sword in the time of their calamity, in the time of the iniquity of the end;

I will make thee a perpetual desolation, and thy cities shall not be inhabited; and ye shall know that I am Jehovah.

And thou shalt prepare a meal-offering with it morning by morning, the sixth part of an ephah, and the third part of a hin of oil, to moisten the fine flour; a meal-offering unto Jehovah continually by a perpetual ordinance.