فَإِنۡ حَآجُّوكَ فَقُلۡ أَسۡلَمۡتُ وَجۡهِيَ لِلَّهِ وَمَنِ ٱتَّبَعَنِۗ وَقُل لِّلَّذِينَ أُوتُواْ ٱلۡكِتَٰبَ وَٱلۡأُمِّيِّـۧنَ ءَأَسۡلَمۡتُمۡۚ فَإِنۡ أَسۡلَمُواْ فَقَدِ ٱهۡتَدَواْۖ وَّإِن تَوَلَّوۡاْ فَإِنَّمَا عَلَيۡكَ ٱلۡبَلَٰغُۗ وَٱللَّهُ بَصِيرُۢ بِٱلۡعِبَادِ

Fa in haaajjooka faqul aslamtu wajhiya lillaahi wa manit taba'an; wa qul lillazeena ootul Kitaaba wal ummiyyeena 'a-aslamtum; fa in aslamoo faqadih tadaw wa in tawallaw fa innamaa 'alaikal balaagh; wallaahu baseerum bil 'ibaad

So if they dispute with thee, say: "I have submitted My whole self to Allah and so have those who follow me." And say to the People of the Book and to those who are unlearned: "Do ye (also) submit yourselves?" If they do, they are in right guidance, but if they turn back, Thy duty is to convey the Message; and in Allah's sight are (all) His servants.

— Aali Imran (آلِ عِمْرَان), 3:20