And We raised above them the mount by the covenant with them and We said to them �Enter the gate bowing�; and We said to them �Transgress not the Sabbath and We took from them a firm covenant. The more signs were given to them outwardly the more denial and rejec- tion there was in their hearts. Receiving more communications did not benefit them since the eyes of their hearts were not open to witnessing [these communications]. God most high said �But signs and warners do not avail a folk who will not believe� [10:101].