If an unbeliever invites you to a meal and you want to go, eat anything set before you without raising questions of conscience.
KJV
If any of them that believe not bid you [to a feast], and ye be disposed to go; whatsoever is set before you, eat, asking no question for conscience sake.
ASV
If one of them that believe not biddeth you to a feast, and ye are disposed to go; whatsoever is set before you, eat, asking no question for conscience’ sake.