سورة Al-Imran ( The Famiy of Imran ) - الآية 20

So if they dispute with you say: \"I have submitted myself to Allah, and (so have) those who follow me.\" And say to those who were given the Scripture (Jews and Christians) and to those who are illiterate (Arab pagans): \"Do you (also) submit yourselves\" If they do, they are rightly guided; but if they turn away, your duty is only to convey the Message; and Allah sees the servants.