His punishment was that he got chained to a rock and every day the eagle would eat his liver and when it was done he would heal so that the eagle could come back the next day to feast. Sorry if this information is wrong because i gained it through reading Percy Jackson.
'Prometheus, as punishment for giving fire to the humans, I am chaining you to this and every day you will be forced to listen to Justin Bieber.'
'Kill me, please!!'
'Kill me, please!!'