And when they meet those who believe they say, `We (too) have believed.' But when they go apart one with another they say, `Do you inform them (- the Muslims) what Allâh has disclosed to you, (- of the prophecies in your Scriptures about the Prophet), that they thereby availing themselves of it (- the Scriptures), may prevail upon you in argumentation on the authority of your Lord? Will you not, then, use your reasoning power?'