'Age abiding' in the Bible

Then shall ye say unto them - That the waters of the Jordan, were cut off, from before the ark of the covenant of Yahweh, when it passed into the Jordan, the waters of the Jordan, were cut off. So shall these stones become a memorial unto the sons of Israel, unto times age-abiding.

So then Joshua burned Ai, - and made of it an age-abiding heap - a desolation, as it remaineth until this day.

So then Moses sware on that day saying, Surely, the land on which thy foot hath trodden, unto thee, shall belong, for an inheritance, and unto thy sons, unto times age-abiding, - because thou hast wholly followed Yahweh my God.