'Perpetuity' in the Bible

Thou meetest him that rejoiceth to do righteousness, those that remember thee in thy ways: (behold, thou wast wroth, and we have sinned:) in those is perpetuity, and we shall be saved.

But he, having offered one sacrifice for sins, sat down in perpetuity at the right hand of God,

For by one offering he has perfected in perpetuity the sanctified.