What was considered old back then...
How long a life did Greeks and Romans live 2000-2500 years ago ?
In the US, if you born in 1900, life expectancy at the time of birth, was approx. 46 for a man and approx. 48 for a woman.
9 Our life is cut short by your anger;
it fades away like a whisper.
10 Seventy years is all we have—
eighty years, if we are strong;
yet all they bring us is trouble and sorrow;
life is soon over, and we are gone. - Psalms 90
Most say the Psalms were written between 1000 and 500 BC.