For in so many days the world was made, in so many thousand years shall it be concluded. Irenaeus, taught by Polycarp a hearer of Apostle John
Attend, my children, to the meaning of this expression, He finished in six days. This implies that the Lord will finish all things in six thousand years, for a day is with Him a thousand years. And He Himself testifies, saying, Behold, today will be as a thousand years. Therefore, my children, in six days, that is, in six thousand years, all things will be finished. And He rested on the seventh day. This means: when His Son, coming [again], shall destroy the time of the wicked man, and judge the ungodly, and change the-sun, and the moon, and the stars, then shall He truly rest on the seventh day. Barnabas--named an apostle in Acts 14