'Retire' in the Bible

And from fifty years old he shall retire from the labour of the service, and shall serve no more;

And Hezekiah king of Judah sent to the king of Assyria to Lachish, saying, I have sinned; retire from me: I will bear what thou layest upon me. And the king of Assyria laid upon Hezekiah king of Judah three hundred talents of silver and thirty talents of gold.