Except him who brings to Allah a clean heart.meaning, free from any impurity or Shirk.Ibn Sirin said,"The clean heart knows that Allah is true, that the Hour will undoubtedly come and that Allah will resurrect those who are in the graves."Sa`id bin Al-Musayyib said,"The clean heart is the sound heart."This is the heart of the believer, for the heart of the disbeliever and the hypocrite is sick. Allah says:فِى قُلُوبِهِمْمَّرَضٌ (In their hearts is a disease). (2:10)Abu Uthman An-Nisaburi said,"It is the heart that is free from innovation and is content with the Sunnah.