When mankind had become corrupted in the period preceding the flood, God said: 'My spirit shall not abide in man for ever, for he is flesh; his days shall be a hundred and twenty years' (Gen. 6:3).
This probably dates back to the early bronze age or even the neolithic. For all the hype it seems human biology hasn't changed since the appearance of humans.
Another biblical example is Psalm 90:10: "Our days may come to seventy years, or eighty, if our strength endures; yet the best of them are but trouble and sorrow, for they quickly pass, and we fly away."
This probably dates back to the early bronze age or even the neolithic. For all the hype it seems human biology hasn't changed since the appearance of humans.