هَذَا هُدًىThis is Huda (guidance).in reference to the Qur'an,وَالَّذِينَ كَفَرُوا بِأيَاتِ رَبِّهِمْ لَهُمْ عَذَابٌ مَّن رِّجْزٍ أَلِيمٌAnd those who disbelieve in the Ayat of their Lord, for them there is a painful torment of Rijz.that is agonizing and severe. Allah knows best