Qur'an, Al-An'am, Surah 6:68-69
'When you meet people who scoff at our revelations, withdraw from them until they can talk in some other way. If Satan causes you to forget this warning, leave such sinners as soon as you remember.' Those who honour God, are not in the least accountable for those who dishonour him. 'We tell you this so that you may guard yourself against evil.'