'Lifespan' in the Bible

So the LORD said, "My Spirit won't remain with human beings forever, because they're truly mortal. Their lifespan will be 120 years."

Look, you have made my days [mere] handbreadths, and my lifespan as nothing next to you. Surely every person standing firm [is] complete vanity. Selah

But you, O God, will bring them down to the deep Pit. Violent and deceitful people will not live even half a normal lifespan. But as for me, I trust in you.

Take note of my brief lifespan! Why do you make all people so mortal?

"Which of you, by being anxious, can add one moment to his lifespan?