18وَإِن تُكَذِّبوا فَقَد كَذَّبَ أُمَمٌ مِن قَبلِكُم ۖ وَما عَلَى الرَّسولِ إِلَّا البَلاغُ المُبينُJ. M. RodwellSuppose that ye treat me as a liar! nations before you have treated God's messenger as a liar; but open preaching is his only duty.