'Old' in the Bible

Nicodemus said to him, How is it possible for a man to be given birth when he is old? Is he able to go into his mother's body a second time and come to birth again?

Then the Jews said to him, You are not fifty years old; have you seen Abraham?

But how it is he is now able to see, or who made his eyes open, we are not able to say: put the question to him; he is old enough to give an answer for himself.

That was the reason why they said, He is old enough; put the question to him.

Truly I say to you, When you were young, you made yourself ready and went wherever you had a desire to go: but when you are old, you will put out your hands and another will make you ready, and you will be taken where you have no desire to go.