No just estimate of Allah do they make when they say: "Nothing doth Allah send down to man (by way of revelation)" Say: "Who then sent down the Book which Moses brought?- a light and guidance to man: But ye make it into (separate) sheets for show, while ye conceal much (of its contents): therein were ye taught that which ye knew not- neither ye nor your fathers." Say: "Allah (sent it down)": Then leave them to plunge in vain discourse and trifling. Al-An'am 6:91 ⧉
Tafsir:
When the call of the Prophet Muhammad reached the people of Makkah, some of them asked certain Jews what they thought about it and whether God’s Word had really been revealed to the Prophet Mohammad. The Jews replied that God had not made revelations to any human being. This is obviously very strange, because the Jews themselves accepted a series of prophets, thus tacitly admitting that God’s word had indeed been revealed from time to time to human beings. But when a man blindly opposes anything, he will go to the extent of contradicting his own accepted ideas in the heat of attempting to defeat his opponent.