There is one Biblical reference to retirement on any grounds other than ill health. And it's in Luke 12.
Then Jesus said to them, “Watch out! Be on your guard against all kinds of greed; life does not consist in an abundance of possessions.” And he told them this parable: “The ground of a certain rich man yielded an abundant harvest. He thought to himself, ‘What shall I do? I have no place to store my crops.’
“Then he said, ‘This is what I’ll do. I will tear down my barns and build bigger ones, and there I will store my surplus grain. And I’ll say to myself, “You have plenty of grain laid up for many years. Take life easy; eat, drink and be merry.”’
“But God said to him, ‘You fool! This very night your life will be demanded from you. Then who will get what you have prepared for yourself?’
“This is how it will be with whoever stores up things for themselves but is not rich toward God.”
Luke 12:15-21, NIV
And it's great to see that John Piper's on the same page...
HT to What's Best Next? for the video.