Don Quixote Volume 2, Chapter 42
The Duke and Duchess prepare the servants for the next practical joke. Sancho tells the Duke that after seeing the sky he would prefer a teeny tiny piece of that instead of the island. The Duke says this is not his to give, only God can give a piece of heaven; but he's got a nice round fertile island for Sancho to govern and if he does it well he'll secure himself a place in heaven. Sancho says okay, after all, he is curious to find out what it would be like to be governor. The Duke promises that he will love it -- there's nothing like being in charge.
Don Quijote points out that Sancho's ship has come in before his own and he has done nothing to deserve it, so he'd better be grateful. He then continues to give him very sage, wise advice regarding governing wisely.