Just his idea of “weeding the garden”. Plants (or in this instance, people) that are too old, or unattractive, or fail to measure up in some arcane way of judging, are deemed “unfit” and ripped out.
There is a Biblical template of “three score and ten”, but that is a suggestion, not a directive. Psalm 90:10 - The days of our years [are] threescore years and ten; and if by reason of strength [they be] fourscore years, yet [is] their strength labor and sorrow; for it is soon cut off, and we fly away.
But elsewhere man is offered an optimal age of 120 years, and even that is not an absolute.
Adam was supposed to live forever, you know. And he only made it about 900 years or so.
Old age ain’t for sissies.