فَإِنْ حَآجُّوكَ فَقُلْ أَسْلَمْتُ وَجْهِىَ لِلَّهِ وَمَنِ ٱتَّبَعَنِ ۗ وَقُل لِّلَّذِينَ أُوتُوا ٱلْكِتَـٰبَ وَٱلْأُمِّيِّـۧنَ ءَأَسْلَمْتُمْ ۚ فَإِنْ أَسْلَمُوا فَقَدِ ٱهْتَدَوا ۖ وَّإِن تَوَلَّوْا فَإِنَّمَا عَلَيْكَ ٱلْبَلَـٰغُ ۗ وَٱللَّهُ بَصِيرٌۢ بِٱلْعِبَادِ

Fa-in hajjooka faqul aslamtu wajhiyalillahi wamani ittabaAAani waqul lillatheena ootooalkitaba walommiyyeena aaslamtum fa-inaslamoo faqadi ihtadaw wa-in tawallaw fa-innama AAalaykaalbalaghu wallahu baseerun bilAAibad

So if they argue with you, say, "I have submitted myself to Allāh [in Islām], and [so have] those who follow me." And say to those who were given the Scripture and [to] the unlearned, "Have you submitted yourselves?" And if they submit [in Islām], they are rightly guided; but if they turn away - then upon you is only the [duty of] notification. And Allāh is Seeing of [His] servants.