209 Preface فَإِن زَلَلتُم مِن بَعدِ ما جاءَتكُمُ البَيِّناتُ فَاعلَموا أَنَّ اللَّهَ عَزيزٌ حَكيمٌAhmed AliIf you falter even after Our signs have reached you, then do not forget that God is all-powerful and all-wise.