Makes much sense!
It immediately reminded me of Proverbs 10:27
I think you are on the right track. Like Proverbs 10:27.
It is being used as a measurement of a man.
Go, and say to Hezekiah, Thus saith the Lord, the God of David thy father, I have heard thy prayer, I have seen thy tears: behold, I will add unto thy days fifteen years. Isaiah.
Ive seen the same concept in the bible using height as a measurement of a man.
Thoughts increase height.
Which of you by taking thought can add one cubit unto his stature? Matthew.
In Islam it is said Adam was 60 cubits tall and people have been getting lower in stature since Adam. It is also said Mohammad saw a man so tall he was unable to see his head, and than person was Abraham.
The age measurement concept is also used in Buddhism.
As in the Cakkavatti Sutta. The wheel turning emperor
"In the past, unskillful behavior was unknown among the human race. As a result, people lived for an immensely long time — 80,000 years — endowed with great beauty, wealth, pleasure, and strength. Over the course of time, though, they began behaving in various unskillful ways. This caused the human life span gradually to shorten, to the point where it now stands at 100 years".
"With the recovery of virtue, the human life span will gradually increase again until it reaches 80,000 years"
The Buddha is the eldest in the Buddhist measurement.
"I am chief of the world,
Eldest in the world. This is the last birth.
There will be [henceforth for me] no more re-becoming."
Miracles of Gautama Buddha - Wikipedia
The number that comes up with the Buddha is 84,000.
It is said the teachings of the Buddha number 84,000 which would be a bit higher than the 80,000 years.