What should a Christian do if an unbeliever invites them to a feast and serves meat offered to idols?

Les teaches that the grace freedom Paul proclaims means the believer need not be troubled about kosher distinctions or meat that may have been in a pagan marketplace. He cites the principle that 'the earth is the Lord's, and the fullness thereof,' and compares it to Peter's vision in Acts, where God told Peter to kill and eat animals he had considered unclean. Paul's instruction is that if an unbeliever invites you to a feast and you are disposed to go, you should eat whatever is set before you, asking no question for conscience' sake. However, if the host tells you ahead of time that the meat being served just came from the pagan temple, that makes it a little bit different.